Merge branch 'develop' into marchcat/b-develop

# Conflicts:
#	indra/llcommon/llerror.h

12 files changed, 2015 insertions, 146 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/CASF.glsl b/indra/newview/app_settings/shaders/class1/deferred/CASF.glsl
index 96d08058cf..e80c59b39f 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/CASF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/CASF.glsl
@@ -2067,9 +2067,6 @@ A_STATIC void CasSetup(
  AF3 CasLoad(ASU2 p) { return texelFetch(diffuseRect, p, 0).rgb; }
  void CasInput(inout AF1 r,inout AF1 g,inout AF1 b)
  {
-    r = AFromSrgbF1(r);
-    g = AFromSrgbF1(g);
-    b = AFromSrgbF1(b);
  }
 
 //------------------------------------------------------------------------------------------------------------------------------
@@ -2553,6 +2550,7 @@ void main()
     vec4 diff = vec4(0.f);
     uvec2 point = uvec2(vary_fragcoord * out_screen_res.xy);
     CasFilter(diff.r, diff.g, diff.b, point, cas_param_0, cas_param_1, true);
-    frag_color = vec4(linear_to_srgb(diff.rgb), 1.0);
+    diff.a = texture(diffuseRect, vary_fragcoord).a;
+    frag_color = diff;
 }
 #endif
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAA.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAA.glsl
new file mode 100644
index 0000000000..fdb77cce6e
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAA.glsl
@@ -0,0 +1,1463 @@
+/**
+ * @file SMAA.glsl
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#extension GL_ARB_texture_rectangle : enable
+#extension GL_ARB_shader_texture_lod : enable
+#extension GL_EXT_gpu_shader4 : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef VERTEX_SHADER
+    #define SMAA_INCLUDE_VS 1
+    #define SMAA_INCLUDE_PS 0
+#else
+    #define SMAA_INCLUDE_VS 0
+    #define SMAA_INCLUDE_PS 1
+#endif
+
+uniform vec4 SMAA_RT_METRICS;
+
+/**
+ * Copyright (C) 2013 Jorge Jimenez (jorge@iryoku.com)
+ * Copyright (C) 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
+ * Copyright (C) 2013 Belen Masia (bmasia@unizar.es)
+ * Copyright (C) 2013 Fernando Navarro (fernandn@microsoft.com)
+ * Copyright (C) 2013 Diego Gutierrez (diegog@unizar.es)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is furnished to
+ * do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software. As clarification, there
+ * is no requirement that the copyright notice and permission be included in
+ * binary distributions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+
+/**
+ *                  _______  ___  ___       ___           ___
+ *                 /       ||   \/   |     /   \         /   \
+ *                |   (---- |  \  /  |    /  ^  \       /  ^  \
+ *                 \   \    |  |\/|  |   /  /_\  \     /  /_\  \
+ *              ----)   |   |  |  |  |  /  _____  \   /  _____  \
+ *             |_______/    |__|  |__| /__/     \__\ /__/     \__\
+ *
+ *                               E N H A N C E D
+ *       S U B P I X E L   M O R P H O L O G I C A L   A N T I A L I A S I N G
+ *
+ *                         http://www.iryoku.com/smaa/
+ *
+ * Hi, welcome aboard!
+ *
+ * Here you'll find instructions to get the shader up and running as fast as
+ * possible.
+ *
+ * IMPORTANTE NOTICE: when updating, remember to update both this file and the
+ * precomputed textures! They may change from version to version.
+ *
+ * The shader has three passes, chained together as follows:
+ *
+ *                           |input|------------------�
+ *                              v                     |
+ *                    [ SMAA*EdgeDetection ]          |
+ *                              v                     |
+ *                          |edgesTex|                |
+ *                              v                     |
+ *              [ SMAABlendingWeightCalculation ]     |
+ *                              v                     |
+ *                          |blendTex|                |
+ *                              v                     |
+ *                [ SMAANeighborhoodBlending ] <------�
+ *                              v
+ *                           |output|
+ *
+ * Note that each [pass] has its own vertex and pixel shader. Remember to use
+ * oversized triangles instead of quads to avoid overshading along the
+ * diagonal.
+ *
+ * You've three edge detection methods to choose from: luma, color or depth.
+ * They represent different quality/performance and anti-aliasing/sharpness
+ * tradeoffs, so our recommendation is for you to choose the one that best
+ * suits your particular scenario:
+ *
+ * - Depth edge detection is usually the fastest but it may miss some edges.
+ *
+ * - Luma edge detection is usually more expensive than depth edge detection,
+ *   but catches visible edges that depth edge detection can miss.
+ *
+ * - Color edge detection is usually the most expensive one but catches
+ *   chroma-only edges.
+ *
+ * For quickstarters: just use luma edge detection.
+ *
+ * The general advice is to not rush the integration process and ensure each
+ * step is done correctly (don't try to integrate SMAA T2x with predicated edge
+ * detection from the start!). Ok then, let's go!
+ *
+ *  1. The first step is to create two RGBA temporal render targets for holding
+ *     |edgesTex| and |blendTex|.
+ *
+ *     In DX10 or DX11, you can use a RG render target for the edges texture.
+ *     In the case of NVIDIA GPUs, using RG render targets seems to actually be
+ *     slower.
+ *
+ *     On the Xbox 360, you can use the same render target for resolving both
+ *     |edgesTex| and |blendTex|, as they aren't needed simultaneously.
+ *
+ *  2. Both temporal render targets |edgesTex| and |blendTex| must be cleared
+ *     each frame. Do not forget to clear the alpha channel!
+ *
+ *  3. The next step is loading the two supporting precalculated textures,
+ *     'areaTex' and 'searchTex'. You'll find them in the 'Textures' folder as
+ *     C++ headers, and also as regular DDS files. They'll be needed for the
+ *     'SMAABlendingWeightCalculation' pass.
+ *
+ *     If you use the C++ headers, be sure to load them in the format specified
+ *     inside of them.
+ *
+ *     You can also compress 'areaTex' and 'searchTex' using BC5 and BC4
+ *     respectively, if you have that option in your content processor pipeline.
+ *     When compressing then, you get a non-perceptible quality decrease, and a
+ *     marginal performance increase.
+ *
+ *  4. All samplers must be set to linear filtering and clamp.
+ *
+ *     After you get the technique working, remember that 64-bit inputs have
+ *     half-rate linear filtering on GCN.
+ *
+ *     If SMAA is applied to 64-bit color buffers, switching to point filtering
+ *     when accesing them will increase the performance. Search for
+ *     'SMAASamplePoint' to see which textures may benefit from point
+ *     filtering, and where (which is basically the color input in the edge
+ *     detection and resolve passes).
+ *
+ *  5. All texture reads and buffer writes must be non-sRGB, with the exception
+ *     of the input read and the output write in
+ *     'SMAANeighborhoodBlending' (and only in this pass!). If sRGB reads in
+ *     this last pass are not possible, the technique will work anyway, but
+ *     will perform antialiasing in gamma space.
+ *
+ *     IMPORTANT: for best results the input read for the color/luma edge
+ *     detection should *NOT* be sRGB.
+ *
+ *  6. Before including SMAA.h you'll have to setup the render target metrics,
+ *     the target and any optional configuration defines. Optionally you can
+ *     use a preset.
+ *
+ *     You have the following targets available:
+ *         SMAA_HLSL_3
+ *         SMAA_HLSL_4
+ *         SMAA_HLSL_4_1
+ *         SMAA_GLSL_2 *
+ *         SMAA_GLSL_3 *
+ *         SMAA_GLSL_4 *
+ *
+ *         * (See SMAA_INCLUDE_VS and SMAA_INCLUDE_PS below).
+ *
+ *     And four presets:
+ *         SMAA_PRESET_LOW          (%60 of the quality)
+ *         SMAA_PRESET_MEDIUM       (%80 of the quality)
+ *         SMAA_PRESET_HIGH         (%95 of the quality)
+ *         SMAA_PRESET_ULTRA        (%99 of the quality)
+ *
+ *     For example:
+ *         #define SMAA_RT_METRICS float4(1.0 / 1280.0, 1.0 / 720.0, 1280.0, 720.0)
+ *         #define SMAA_HLSL_4
+ *         #define SMAA_PRESET_HIGH
+ *         #include "SMAA.h"
+ *
+ *     Note that SMAA_RT_METRICS doesn't need to be a macro, it can be a
+ *     uniform variable. The code is designed to minimize the impact of not
+ *     using a constant value, but it is still better to hardcode it.
+ *
+ *     Depending on how you encoded 'areaTex' and 'searchTex', you may have to
+ *     add (and customize) the following defines before including SMAA.h:
+ *          #define SMAA_AREATEX_SELECT(sample) sample.rg
+ *          #define SMAA_SEARCHTEX_SELECT(sample) sample.r
+ *
+ *     If your engine is already using porting macros, you can define
+ *     SMAA_CUSTOM_SL, and define the porting functions by yourself.
+ *
+ *  7. Then, you'll have to setup the passes as indicated in the scheme above.
+ *     You can take a look into SMAA.fx, to see how we did it for our demo.
+ *     Checkout the function wrappers, you may want to copy-paste them!
+ *
+ *  8. It's recommended to validate the produced |edgesTex| and |blendTex|.
+ *     You can use a screenshot from your engine to compare the |edgesTex|
+ *     and |blendTex| produced inside of the engine with the results obtained
+ *     with the reference demo.
+ *
+ *  9. After you get the last pass to work, it's time to optimize. You'll have
+ *     to initialize a stencil buffer in the first pass (discard is already in
+ *     the code), then mask execution by using it the second pass. The last
+ *     pass should be executed in all pixels.
+ *
+ *
+ * After this point you can choose to enable predicated thresholding,
+ * temporal supersampling and motion blur integration:
+ *
+ * a) If you want to use predicated thresholding, take a look into
+ *    SMAA_PREDICATION; you'll need to pass an extra texture in the edge
+ *    detection pass.
+ *
+ * b) If you want to enable temporal supersampling (SMAA T2x):
+ *
+ * 1. The first step is to render using subpixel jitters. I won't go into
+ *    detail, but it's as simple as moving each vertex position in the
+ *    vertex shader, you can check how we do it in our DX10 demo.
+ *
+ * 2. Then, you must setup the temporal resolve. You may want to take a look
+ *    into SMAAResolve for resolving 2x modes. After you get it working, you'll
+ *    probably see ghosting everywhere. But fear not, you can enable the
+ *    CryENGINE temporal reprojection by setting the SMAA_REPROJECTION macro.
+ *    Check out SMAA_DECODE_VELOCITY if your velocity buffer is encoded.
+ *
+ * 3. The next step is to apply SMAA to each subpixel jittered frame, just as
+ *    done for 1x.
+ *
+ * 4. At this point you should already have something usable, but for best
+ *    results the proper area textures must be set depending on current jitter.
+ *    For this, the parameter 'subsampleIndices' of
+ *    'SMAABlendingWeightCalculationPS' must be set as follows, for our T2x
+ *    mode:
+ *
+ *    @SUBSAMPLE_INDICES
+ *
+ *    | S# |  Camera Jitter   |  subsampleIndices    |
+ *    +----+------------------+---------------------+
+ *    |  0 |  ( 0.25, -0.25)  |  float4(1, 1, 1, 0)  |
+ *    |  1 |  (-0.25,  0.25)  |  float4(2, 2, 2, 0)  |
+ *
+ *    These jitter positions assume a bottom-to-top y axis. S# stands for the
+ *    sample number.
+ *
+ * More information about temporal supersampling here:
+ *    http://iryoku.com/aacourse/downloads/13-Anti-Aliasing-Methods-in-CryENGINE-3.pdf
+ *
+ * c) If you want to enable spatial multisampling (SMAA S2x):
+ *
+ * 1. The scene must be rendered using MSAA 2x. The MSAA 2x buffer must be
+ *    created with:
+ *      - DX10:     see below (*)
+ *      - DX10.1:   D3D10_STANDARD_MULTISAMPLE_PATTERN or
+ *      - DX11:     D3D11_STANDARD_MULTISAMPLE_PATTERN
+ *
+ *    This allows to ensure that the subsample order matches the table in
+ *    @SUBSAMPLE_INDICES.
+ *
+ *    (*) In the case of DX10, we refer the reader to:
+ *      - SMAA::detectMSAAOrder and
+ *      - SMAA::msaaReorder
+ *
+ *    These functions allow to match the standard multisample patterns by
+ *    detecting the subsample order for a specific GPU, and reordering
+ *    them appropriately.
+ *
+ * 2. A shader must be run to output each subsample into a separate buffer
+ *    (DX10 is required). You can use SMAASeparate for this purpose, or just do
+ *    it in an existing pass (for example, in the tone mapping pass, which has
+ *    the advantage of feeding tone mapped subsamples to SMAA, which will yield
+ *    better results).
+ *
+ * 3. The full SMAA 1x pipeline must be run for each separated buffer, storing
+ *    the results in the final buffer. The second run should alpha blend with
+ *    the existing final buffer using a blending factor of 0.5.
+ *    'subsampleIndices' must be adjusted as in the SMAA T2x case (see point
+ *    b).
+ *
+ * d) If you want to enable temporal supersampling on top of SMAA S2x
+ *    (which actually is SMAA 4x):
+ *
+ * 1. SMAA 4x consists on temporally jittering SMAA S2x, so the first step is
+ *    to calculate SMAA S2x for current frame. In this case, 'subsampleIndices'
+ *    must be set as follows:
+ *
+ *    | F# | S# |   Camera Jitter    |    Net Jitter     |   subsampleIndices   |
+ *    +----+----+--------------------+-------------------+----------------------+
+ *    |  0 |  0 |  ( 0.125,  0.125)  |  ( 0.375, -0.125) |  float4(5, 3, 1, 3)  |
+ *    |  0 |  1 |  ( 0.125,  0.125)  |  (-0.125,  0.375) |  float4(4, 6, 2, 3)  |
+ *    +----+----+--------------------+-------------------+----------------------+
+ *    |  1 |  2 |  (-0.125, -0.125)  |  ( 0.125, -0.375) |  float4(3, 5, 1, 4)  |
+ *    |  1 |  3 |  (-0.125, -0.125)  |  (-0.375,  0.125) |  float4(6, 4, 2, 4)  |
+ *
+ *    These jitter positions assume a bottom-to-top y axis. F# stands for the
+ *    frame number. S# stands for the sample number.
+ *
+ * 2. After calculating SMAA S2x for current frame (with the new subsample
+ *    indices), previous frame must be reprojected as in SMAA T2x mode (see
+ *    point b).
+ *
+ * e) If motion blur is used, you may want to do the edge detection pass
+ *    together with motion blur. This has two advantages:
+ *
+ * 1. Pixels under heavy motion can be omitted from the edge detection process.
+ *    For these pixels we can just store "no edge", as motion blur will take
+ *    care of them.
+ * 2. The center pixel tap is reused.
+ *
+ * Note that in this case depth testing should be used instead of stenciling,
+ * as we have to write all the pixels in the motion blur pass.
+ *
+ * That's it!
+ */
+
+//-----------------------------------------------------------------------------
+// SMAA Presets
+
+/**
+ * Note that if you use one of these presets, the following configuration
+ * macros will be ignored if set in the "Configurable Defines" section.
+ */
+
+#if defined(SMAA_PRESET_LOW)
+#define SMAA_THRESHOLD 0.15
+#define SMAA_MAX_SEARCH_STEPS 4
+#define SMAA_DISABLE_DIAG_DETECTION
+#define SMAA_DISABLE_CORNER_DETECTION
+#elif defined(SMAA_PRESET_MEDIUM)
+#define SMAA_THRESHOLD 0.1
+#define SMAA_MAX_SEARCH_STEPS 8
+#define SMAA_DISABLE_DIAG_DETECTION
+#define SMAA_DISABLE_CORNER_DETECTION
+#elif defined(SMAA_PRESET_HIGH)
+#define SMAA_THRESHOLD 0.1
+#define SMAA_MAX_SEARCH_STEPS 16
+#define SMAA_MAX_SEARCH_STEPS_DIAG 8
+#define SMAA_CORNER_ROUNDING 25
+#elif defined(SMAA_PRESET_ULTRA)
+#define SMAA_THRESHOLD 0.05
+#define SMAA_MAX_SEARCH_STEPS 32
+#define SMAA_MAX_SEARCH_STEPS_DIAG 16
+#define SMAA_CORNER_ROUNDING 25
+#endif
+
+//-----------------------------------------------------------------------------
+// Configurable Defines
+
+/**
+ * SMAA_THRESHOLD specifies the threshold or sensitivity to edges.
+ * Lowering this value you will be able to detect more edges at the expense of
+ * performance.
+ *
+ * Range: [0, 0.5]
+ *   0.1 is a reasonable value, and allows to catch most visible edges.
+ *   0.05 is a rather overkill value, that allows to catch 'em all.
+ *
+ *   If temporal supersampling is used, 0.2 could be a reasonable value, as low
+ *   contrast edges are properly filtered by just 2x.
+ */
+#ifndef SMAA_THRESHOLD
+#define SMAA_THRESHOLD 0.1
+#endif
+
+/**
+ * SMAA_DEPTH_THRESHOLD specifies the threshold for depth edge detection.
+ *
+ * Range: depends on the depth range of the scene.
+ */
+#ifndef SMAA_DEPTH_THRESHOLD
+#define SMAA_DEPTH_THRESHOLD (0.1 * SMAA_THRESHOLD)
+#endif
+
+/**
+ * SMAA_MAX_SEARCH_STEPS specifies the maximum steps performed in the
+ * horizontal/vertical pattern searches, at each side of the pixel.
+ *
+ * In number of pixels, it's actually the double. So the maximum line length
+ * perfectly handled by, for example 16, is 64 (by perfectly, we meant that
+ * longer lines won't look as good, but still antialiased).
+ *
+ * Range: [0, 112]
+ */
+#ifndef SMAA_MAX_SEARCH_STEPS
+#define SMAA_MAX_SEARCH_STEPS 16
+#endif
+
+/**
+ * SMAA_MAX_SEARCH_STEPS_DIAG specifies the maximum steps performed in the
+ * diagonal pattern searches, at each side of the pixel. In this case we jump
+ * one pixel at time, instead of two.
+ *
+ * Range: [0, 20]
+ *
+ * On high-end machines it is cheap (between a 0.8x and 0.9x slower for 16
+ * steps), but it can have a significant impact on older machines.
+ *
+ * Define SMAA_DISABLE_DIAG_DETECTION to disable diagonal processing.
+ */
+#ifndef SMAA_MAX_SEARCH_STEPS_DIAG
+#define SMAA_MAX_SEARCH_STEPS_DIAG 8
+#endif
+
+/**
+ * SMAA_CORNER_ROUNDING specifies how much sharp corners will be rounded.
+ *
+ * Range: [0, 100]
+ *
+ * Define SMAA_DISABLE_CORNER_DETECTION to disable corner processing.
+ */
+#ifndef SMAA_CORNER_ROUNDING
+#define SMAA_CORNER_ROUNDING 25
+#endif
+
+/**
+ * If there is an neighbor edge that has SMAA_LOCAL_CONTRAST_FACTOR times
+ * bigger contrast than current edge, current edge will be discarded.
+ *
+ * This allows to eliminate spurious crossing edges, and is based on the fact
+ * that, if there is too much contrast in a direction, that will hide
+ * perceptually contrast in the other neighbors.
+ */
+#ifndef SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR
+#define SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR 2.0
+#endif
+
+/**
+ * Predicated thresholding allows to better preserve texture details and to
+ * improve performance, by decreasing the number of detected edges using an
+ * additional buffer like the light accumulation buffer, object ids or even the
+ * depth buffer (the depth buffer usage may be limited to indoor or short range
+ * scenes).
+ *
+ * It locally decreases the luma or color threshold if an edge is found in an
+ * additional buffer (so the global threshold can be higher).
+ *
+ * This method was developed by Playstation EDGE MLAA team, and used in
+ * Killzone 3, by using the light accumulation buffer. More information here:
+ *     http://iryoku.com/aacourse/downloads/06-MLAA-on-PS3.pptx
+ */
+#ifndef SMAA_PREDICATION
+#define SMAA_PREDICATION 0
+#endif
+
+/**
+ * Threshold to be used in the additional predication buffer.
+ *
+ * Range: depends on the input, so you'll have to find the magic number that
+ * works for you.
+ */
+#ifndef SMAA_PREDICATION_THRESHOLD
+#define SMAA_PREDICATION_THRESHOLD 0.01
+#endif
+
+/**
+ * How much to scale the global threshold used for luma or color edge
+ * detection when using predication.
+ *
+ * Range: [1, 5]
+ */
+#ifndef SMAA_PREDICATION_SCALE
+#define SMAA_PREDICATION_SCALE 2.0
+#endif
+
+/**
+ * How much to locally decrease the threshold.
+ *
+ * Range: [0, 1]
+ */
+#ifndef SMAA_PREDICATION_STRENGTH
+#define SMAA_PREDICATION_STRENGTH 0.4
+#endif
+
+/**
+ * Temporal reprojection allows to remove ghosting artifacts when using
+ * temporal supersampling. We use the CryEngine 3 method which also introduces
+ * velocity weighting. This feature is of extreme importance for totally
+ * removing ghosting. More information here:
+ *    http://iryoku.com/aacourse/downloads/13-Anti-Aliasing-Methods-in-CryENGINE-3.pdf
+ *
+ * Note that you'll need to setup a velocity buffer for enabling reprojection.
+ * For static geometry, saving the previous depth buffer is a viable
+ * alternative.
+ */
+#ifndef SMAA_REPROJECTION
+#define SMAA_REPROJECTION 0
+#endif
+
+/**
+ * SMAA_REPROJECTION_WEIGHT_SCALE controls the velocity weighting. It allows to
+ * remove ghosting trails behind the moving object, which are not removed by
+ * just using reprojection. Using low values will exhibit ghosting, while using
+ * high values will disable temporal supersampling under motion.
+ *
+ * Behind the scenes, velocity weighting removes temporal supersampling when
+ * the velocity of the subsamples differs (meaning they are different objects).
+ *
+ * Range: [0, 80]
+ */
+#ifndef SMAA_REPROJECTION_WEIGHT_SCALE
+#define SMAA_REPROJECTION_WEIGHT_SCALE 30.0
+#endif
+
+/**
+ * On some compilers, discard and texture cannot be used in vertex shaders. Thus, they need
+ * to be compiled separately.
+ */
+#ifndef SMAA_INCLUDE_VS
+#define SMAA_INCLUDE_VS 1
+#endif
+#ifndef SMAA_INCLUDE_PS
+#define SMAA_INCLUDE_PS 1
+#endif
+
+//-----------------------------------------------------------------------------
+// Texture Access Defines
+
+#ifndef SMAA_AREATEX_SELECT
+#if defined(SMAA_HLSL_3)
+#define SMAA_AREATEX_SELECT(sample) sample.ra
+#else
+#define SMAA_AREATEX_SELECT(sample) sample.rg
+#endif
+#endif
+
+#ifndef SMAA_SEARCHTEX_SELECT
+#define SMAA_SEARCHTEX_SELECT(sample) sample.r
+#endif
+
+#ifndef SMAA_DECODE_VELOCITY
+#define SMAA_DECODE_VELOCITY(sample) sample.rg
+#endif
+
+//-----------------------------------------------------------------------------
+// Non-Configurable Defines
+
+#define SMAA_AREATEX_MAX_DISTANCE 16
+#define SMAA_AREATEX_MAX_DISTANCE_DIAG 20
+#define SMAA_AREATEX_PIXEL_SIZE (1.0 / float2(160.0, 560.0))
+#define SMAA_AREATEX_SUBTEX_SIZE (1.0 / 7.0)
+#define SMAA_SEARCHTEX_SIZE float2(66.0, 33.0)
+#define SMAA_SEARCHTEX_PACKED_SIZE float2(64.0, 16.0)
+#define SMAA_CORNER_ROUNDING_NORM (float(SMAA_CORNER_ROUNDING) / 100.0)
+
+//-----------------------------------------------------------------------------
+// Porting Functions
+
+#if defined(SMAA_HLSL_3)
+#ifndef SMAA_FLIP_Y
+#define SMAA_FLIP_Y 0
+#endif  // SMAA_FLIP_Y
+#define SMAATexture2D(tex) sampler2D tex
+#define SMAATexturePass2D(tex) tex
+#define SMAASampleLevelZero(tex, coord) tex2Dlod(tex, float4(coord, 0.0, 0.0))
+#define SMAASampleLevelZeroPoint(tex, coord) tex2Dlod(tex, float4(coord, 0.0, 0.0))
+#define SMAASampleLevelZeroOffset(tex, coord, offset) tex2Dlod(tex, float4(coord + offset * SMAA_RT_METRICS.xy, 0.0, 0.0))
+#define SMAASample(tex, coord) tex2D(tex, coord)
+#define SMAASamplePoint(tex, coord) tex2D(tex, coord)
+#define SMAASampleOffset(tex, coord, offset) tex2D(tex, coord + offset * SMAA_RT_METRICS.xy)
+#define SMAA_FLATTEN [flatten]
+#define SMAA_BRANCH [branch]
+#endif
+#if defined(SMAA_HLSL_4) || defined(SMAA_HLSL_4_1)
+#ifndef SMAA_FLIP_Y
+#define SMAA_FLIP_Y 0
+#endif  // SMAA_FLIP_Y
+SamplerState LinearSampler { Filter = MIN_MAG_LINEAR_MIP_POINT; AddressU = Clamp; AddressV = Clamp; };
+SamplerState PointSampler { Filter = MIN_MAG_MIP_POINT; AddressU = Clamp; AddressV = Clamp; };
+#define SMAATexture2D(tex) Texture2D tex
+#define SMAATexturePass2D(tex) tex
+#define SMAASampleLevelZero(tex, coord) tex.SampleLevel(LinearSampler, coord, 0)
+#define SMAASampleLevelZeroPoint(tex, coord) tex.SampleLevel(PointSampler, coord, 0)
+#define SMAASampleLevelZeroOffset(tex, coord, offset) tex.SampleLevel(LinearSampler, coord, 0, offset)
+#define SMAASample(tex, coord) tex.Sample(LinearSampler, coord)
+#define SMAASamplePoint(tex, coord) tex.Sample(PointSampler, coord)
+#define SMAASampleOffset(tex, coord, offset) tex.Sample(LinearSampler, coord, offset)
+#define SMAA_FLATTEN [flatten]
+#define SMAA_BRANCH [branch]
+#define SMAATexture2DMS2(tex) Texture2DMS<float4, 2> tex
+#define SMAALoad(tex, pos, sample) tex.Load(pos, sample)
+#if defined(SMAA_HLSL_4_1)
+#define SMAAGather(tex, coord) tex.Gather(LinearSampler, coord, 0)
+#endif
+#endif
+
+#if defined(SMAA_GLSL_2) || defined(SMAA_GLSL_3) || defined(SMAA_GLSL_4)
+#ifndef SMAA_FLIP_Y
+#define SMAA_FLIP_Y 1
+#endif  // SMAA_FLIP_Y
+
+#define SMAATexture2D(tex) sampler2D tex
+#define SMAATexturePass2D(tex) tex
+#if defined(SMAA_GLSL_2)
+#define SMAASampleLevelZero(tex, coord) texture2DLod(tex, coord, 0.0)
+#define SMAASampleLevelZeroPoint(tex, coord) texture2DLod(tex, coord, 0.0)
+#define SMAASampleLevelZeroOffset(tex, coord, offset) texture2DLodOffset(tex, coord, 0.0, offset)
+#define SMAASample(tex, coord) texture2D(tex, coord)
+#define SMAASamplePoint(tex, coord) texture2D(tex, coord)
+#define SMAASampleOffset(tex, coord, offset) texture2D(tex, coord, offset)
+#else
+#define SMAASampleLevelZero(tex, coord) textureLod(tex, coord, 0.0)
+#define SMAASampleLevelZeroPoint(tex, coord) textureLod(tex, coord, 0.0)
+#define SMAASampleLevelZeroOffset(tex, coord, offset) textureLodOffset(tex, coord, 0.0, offset)
+#define SMAASample(tex, coord) texture(tex, coord)
+#define SMAASamplePoint(tex, coord) texture(tex, coord)
+#define SMAASampleOffset(tex, coord, offset) textureOffset(tex, coord, offset)
+#endif
+#define SMAA_FLATTEN
+#define SMAA_BRANCH
+#define lerp(a, b, t) mix(a, b, t)
+#define saturate(a) clamp(a, 0.0, 1.0)
+#if defined(SMAA_GLSL_4)
+#define mad(a, b, c) fma(a, b, c)
+#define SMAAGather(tex, coord) textureGather(tex, coord)
+#else
+#define mad(a, b, c) (a * b + c)
+#endif
+#if defined(SMAA_GLSL_3) || defined(SMAA_GLSL_4)
+#define SMAATexture2DMS2(tex) sampler2DMS tex
+#define SMAALoad(tex, pos, sample) texelFetch(tex, pos, sample)
+#endif
+#define float2 vec2
+#define float3 vec3
+#define float4 vec4
+#define int2 ivec2
+#define int3 ivec3
+#define int4 ivec4
+#define bool2 bvec2
+#define bool3 bvec3
+#define bool4 bvec4
+#endif
+
+#if !defined(SMAA_HLSL_3) && !defined(SMAA_HLSL_4) && !defined(SMAA_HLSL_4_1) && !defined(SMAA_GLSL_2) && !defined(SMAA_GLSL_3) && !defined(SMAA_GLSL_4) && !defined(SMAA_CUSTOM_SL)
+#error you must define the shading language: SMAA_HLSL_*, SMAA_GLSL_* or SMAA_CUSTOM_SL
+#endif
+
+
+#if SMAA_FLIP_Y
+
+#define API_V_DIR(v) -(v)
+#define API_V_COORD(v) (1.0 - v)
+#define API_V_BELOW(v1, v2) v1 < v2
+#define API_V_ABOVE(v1, v2) v1 > v2
+
+#else  // VULKAN_FLIP
+
+#define API_V_DIR(v) v
+#define API_V_COORD(v) v
+#define API_V_BELOW(v1, v2) v1 > v2
+#define API_V_ABOVE(v1, v2) v1 < v2
+
+#endif  // VULKAN_FLIP
+
+
+//-----------------------------------------------------------------------------
+// Misc functions
+
+#if SMAA_INCLUDE_PS
+/**
+ * Gathers current pixel, and the top-left neighbors.
+ */
+float3 SMAAGatherNeighbours(float2 texcoord,
+                            float4 offset[3],
+                            SMAATexture2D(tex)) {
+    #ifdef SMAAGather
+
+    #if SMAA_FLIP_Y
+    return SMAAGather(tex, texcoord + SMAA_RT_METRICS.xy * float2(-0.5,  0.5)).zwy;
+    #else  // SMAA_FLIP_Y
+    return SMAAGather(tex, texcoord + SMAA_RT_METRICS.xy * float2(-0.5, -0.5)).grb;
+    #endif  // SMAA_FLIP_Y
+
+    #else  // SMAAGather
+    float P = SMAASamplePoint(tex, texcoord).r;
+    float Pleft = SMAASamplePoint(tex, offset[0].xy).r;
+    float Ptop  = SMAASamplePoint(tex, offset[0].zw).r;
+    return float3(P, Pleft, Ptop);
+    #endif
+}
+
+/**
+ * Adjusts the threshold by means of predication.
+ */
+float2 SMAACalculatePredicatedThreshold(float2 texcoord,
+                                        float4 offset[3],
+                                        SMAATexture2D(predicationTex)) {
+    float3 neighbours = SMAAGatherNeighbours(texcoord, offset, SMAATexturePass2D(predicationTex));
+    float2 delta = abs(neighbours.xx - neighbours.yz);
+    float2 edges = step(SMAA_PREDICATION_THRESHOLD, delta);
+    return SMAA_PREDICATION_SCALE * SMAA_THRESHOLD * (1.0 - SMAA_PREDICATION_STRENGTH * edges);
+}
+
+#endif  // SMAA_INCLUDE_PS
+
+/**
+ * Conditional move:
+ */
+void SMAAMovc(bool2 cond, inout float2 variable, float2 value) {
+    SMAA_FLATTEN if (cond.x) variable.x = value.x;
+    SMAA_FLATTEN if (cond.y) variable.y = value.y;
+}
+
+void SMAAMovc(bool4 cond, inout float4 variable, float4 value) {
+    SMAAMovc(cond.xy, variable.xy, value.xy);
+    SMAAMovc(cond.zw, variable.zw, value.zw);
+}
+
+
+#if SMAA_INCLUDE_VS
+//-----------------------------------------------------------------------------
+// Vertex Shaders
+
+/**
+ * Edge Detection Vertex Shader
+ */
+void SMAAEdgeDetectionVS(float2 texcoord,
+                         out float4 offset[3]) {
+    offset[0] = mad(SMAA_RT_METRICS.xyxy, float4(-1.0, 0.0, 0.0, API_V_DIR(-1.0)), texcoord.xyxy);
+    offset[1] = mad(SMAA_RT_METRICS.xyxy, float4( 1.0, 0.0, 0.0, API_V_DIR(1.0)), texcoord.xyxy);
+    offset[2] = mad(SMAA_RT_METRICS.xyxy, float4(-2.0, 0.0, 0.0, API_V_DIR(-2.0)), texcoord.xyxy);
+}
+
+/**
+ * Blend Weight Calculation Vertex Shader
+ */
+void SMAABlendingWeightCalculationVS(float2 texcoord,
+                                     out float2 pixcoord,
+                                     out float4 offset[3]) {
+    pixcoord = texcoord * SMAA_RT_METRICS.zw;
+
+    // We will use these offsets for the searches later on (see @PSEUDO_GATHER4):
+    offset[0] = mad(SMAA_RT_METRICS.xyxy, float4(-0.25, API_V_DIR(-0.125),  1.25, API_V_DIR(-0.125)), texcoord.xyxy);
+    offset[1] = mad(SMAA_RT_METRICS.xyxy, float4(-0.125, API_V_DIR(-0.25), -0.125,  API_V_DIR(1.25)), texcoord.xyxy);
+
+    // And these for the searches, they indicate the ends of the loops:
+    offset[2] = mad(SMAA_RT_METRICS.xxyy,
+                    float4(-2.0, 2.0, API_V_DIR(-2.0), API_V_DIR(2.0)) * float(SMAA_MAX_SEARCH_STEPS),
+                    float4(offset[0].xz, offset[1].yw));
+}
+
+/**
+ * Neighborhood Blending Vertex Shader
+ */
+void SMAANeighborhoodBlendingVS(float2 texcoord,
+                                out float4 offset) {
+    offset = mad(SMAA_RT_METRICS.xyxy, float4( 1.0, 0.0, 0.0, API_V_DIR(1.0)), texcoord.xyxy);
+}
+#endif // SMAA_INCLUDE_VS
+
+#if SMAA_INCLUDE_PS
+//-----------------------------------------------------------------------------
+// Edge Detection Pixel Shaders (First Pass)
+
+/**
+ * Luma Edge Detection
+ *
+ * IMPORTANT NOTICE: luma edge detection requires gamma-corrected colors, and
+ * thus 'colorTex' should be a non-sRGB texture.
+ */
+float2 SMAALumaEdgeDetectionPS(float2 texcoord,
+                               float4 offset[3],
+                               SMAATexture2D(colorTex)
+                               #if SMAA_PREDICATION
+                               , SMAATexture2D(predicationTex)
+                               #endif
+                               ) {
+    // Calculate the threshold:
+    #if SMAA_PREDICATION
+    float2 threshold = SMAACalculatePredicatedThreshold(texcoord, offset, SMAATexturePass2D(predicationTex));
+    #else
+    float2 threshold = float2(SMAA_THRESHOLD, SMAA_THRESHOLD);
+    #endif
+
+    // Calculate lumas:
+    float3 weights = float3(0.2126, 0.7152, 0.0722);
+    float L = dot(SMAASamplePoint(colorTex, texcoord).rgb, weights);
+
+    float Lleft = dot(SMAASamplePoint(colorTex, offset[0].xy).rgb, weights);
+    float Ltop  = dot(SMAASamplePoint(colorTex, offset[0].zw).rgb, weights);
+
+    // We do the usual threshold:
+    float4 delta;
+    delta.xy = abs(L - float2(Lleft, Ltop));
+    float2 edges = step(threshold, delta.xy);
+
+    // Then discard if there is no edge:
+    if (dot(edges, float2(1.0, 1.0)) == 0.0)
+        discard;
+
+    // Calculate right and bottom deltas:
+    float Lright = dot(SMAASamplePoint(colorTex, offset[1].xy).rgb, weights);
+    float Lbottom  = dot(SMAASamplePoint(colorTex, offset[1].zw).rgb, weights);
+    delta.zw = abs(L - float2(Lright, Lbottom));
+
+    // Calculate the maximum delta in the direct neighborhood:
+    float2 maxDelta = max(delta.xy, delta.zw);
+
+    // Calculate left-left and top-top deltas:
+    float Lleftleft = dot(SMAASamplePoint(colorTex, offset[2].xy).rgb, weights);
+    float Ltoptop = dot(SMAASamplePoint(colorTex, offset[2].zw).rgb, weights);
+    delta.zw = abs(float2(Lleft, Ltop) - float2(Lleftleft, Ltoptop));
+
+    // Calculate the final maximum delta:
+    maxDelta = max(maxDelta.xy, delta.zw);
+    float finalDelta = max(maxDelta.x, maxDelta.y);
+
+    // Local contrast adaptation:
+    edges.xy *= step(finalDelta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
+
+    return edges;
+}
+
+/**
+ * Color Edge Detection
+ *
+ * IMPORTANT NOTICE: color edge detection requires gamma-corrected colors, and
+ * thus 'colorTex' should be a non-sRGB texture.
+ */
+float2 SMAAColorEdgeDetectionPS(float2 texcoord,
+                                float4 offset[3],
+                                SMAATexture2D(colorTex)
+                                #if SMAA_PREDICATION
+                                , SMAATexture2D(predicationTex)
+                                #endif
+                                ) {
+    // Calculate the threshold:
+    #if SMAA_PREDICATION
+    float2 threshold = SMAACalculatePredicatedThreshold(texcoord, offset, predicationTex);
+    #else
+    float2 threshold = float2(SMAA_THRESHOLD, SMAA_THRESHOLD);
+    #endif
+
+    // Calculate color deltas:
+    float4 delta;
+    float3 C = SMAASamplePoint(colorTex, texcoord).rgb;
+
+    float3 Cleft = SMAASamplePoint(colorTex, offset[0].xy).rgb;
+    float3 t = abs(C - Cleft);
+    delta.x = max(max(t.r, t.g), t.b);
+
+    float3 Ctop  = SMAASamplePoint(colorTex, offset[0].zw).rgb;
+    t = abs(C - Ctop);
+    delta.y = max(max(t.r, t.g), t.b);
+
+    // We do the usual threshold:
+    float2 edges = step(threshold, delta.xy);
+
+    // Then discard if there is no edge:
+    if (dot(edges, float2(1.0, 1.0)) == 0.0)
+        discard;
+
+    // Calculate right and bottom deltas:
+    float3 Cright = SMAASamplePoint(colorTex, offset[1].xy).rgb;
+    t = abs(C - Cright);
+    delta.z = max(max(t.r, t.g), t.b);
+
+    float3 Cbottom  = SMAASamplePoint(colorTex, offset[1].zw).rgb;
+    t = abs(C - Cbottom);
+    delta.w = max(max(t.r, t.g), t.b);
+
+    // Calculate the maximum delta in the direct neighborhood:
+    float2 maxDelta = max(delta.xy, delta.zw);
+
+    // Calculate left-left and top-top deltas:
+    float3 Cleftleft  = SMAASamplePoint(colorTex, offset[2].xy).rgb;
+    t = abs(C - Cleftleft);
+    delta.z = max(max(t.r, t.g), t.b);
+
+    float3 Ctoptop = SMAASamplePoint(colorTex, offset[2].zw).rgb;
+    t = abs(C - Ctoptop);
+    delta.w = max(max(t.r, t.g), t.b);
+
+    // Calculate the final maximum delta:
+    maxDelta = max(maxDelta.xy, delta.zw);
+    float finalDelta = max(maxDelta.x, maxDelta.y);
+
+    // Local contrast adaptation:
+    edges.xy *= step(finalDelta, SMAA_LOCAL_CONTRAST_ADAPTATION_FACTOR * delta.xy);
+
+    return edges;
+}
+
+/**
+ * Depth Edge Detection
+ */
+float2 SMAADepthEdgeDetectionPS(float2 texcoord,
+                                float4 offset[3],
+                                SMAATexture2D(depthTex)) {
+    float3 neighbours = SMAAGatherNeighbours(texcoord, offset, SMAATexturePass2D(depthTex));
+    float2 delta = abs(neighbours.xx - float2(neighbours.y, neighbours.z));
+    float2 edges = step(SMAA_DEPTH_THRESHOLD, delta);
+
+    if (dot(edges, float2(1.0, 1.0)) == 0.0)
+        discard;
+
+    return edges;
+}
+
+//-----------------------------------------------------------------------------
+// Diagonal Search Functions
+
+#if !defined(SMAA_DISABLE_DIAG_DETECTION)
+
+/**
+ * Allows to decode two binary values from a bilinear-filtered access.
+ */
+float2 SMAADecodeDiagBilinearAccess(float2 e) {
+    // Bilinear access for fetching 'e' have a 0.25 offset, and we are
+    // interested in the R and G edges:
+    //
+    // +---G---+-------+
+    // |   x o R   x   |
+    // +-------+-------+
+    //
+    // Then, if one of these edge is enabled:
+    //   Red:   (0.75 * X + 0.25 * 1) => 0.25 or 1.0
+    //   Green: (0.75 * 1 + 0.25 * X) => 0.75 or 1.0
+    //
+    // This function will unpack the values (mad + mul + round):
+    // wolframalpha.com: round(x * abs(5 * x - 5 * 0.75)) plot 0 to 1
+    e.r = e.r * abs(5.0 * e.r - 5.0 * 0.75);
+    return round(e);
+}
+
+float4 SMAADecodeDiagBilinearAccess(float4 e) {
+    e.rb = e.rb * abs(5.0 * e.rb - 5.0 * 0.75);
+    return round(e);
+}
+
+/**
+ * These functions allows to perform diagonal pattern searches.
+ */
+float2 SMAASearchDiag1(SMAATexture2D(edgesTex), float2 texcoord, float2 dir, out float2 e) {
+    dir.y = API_V_DIR(dir.y);
+    float4 coord = float4(texcoord, -1.0, 1.0);
+    float3 t = float3(SMAA_RT_METRICS.xy, 1.0);
+    while (coord.z < float(SMAA_MAX_SEARCH_STEPS_DIAG - 1) &&
+           coord.w > 0.9) {
+        coord.xyz = mad(t, float3(dir, 1.0), coord.xyz);
+        e = SMAASampleLevelZero(edgesTex, coord.xy).rg;
+        coord.w = dot(e, float2(0.5, 0.5));
+    }
+    return coord.zw;
+}
+
+float2 SMAASearchDiag2(SMAATexture2D(edgesTex), float2 texcoord, float2 dir, out float2 e) {
+    dir.y = API_V_DIR(dir.y);
+    float4 coord = float4(texcoord, -1.0, 1.0);
+    coord.x += 0.25 * SMAA_RT_METRICS.x; // See @SearchDiag2Optimization
+    float3 t = float3(SMAA_RT_METRICS.xy, 1.0);
+    while (coord.z < float(SMAA_MAX_SEARCH_STEPS_DIAG - 1) &&
+           coord.w > 0.9) {
+        coord.xyz = mad(t, float3(dir, 1.0), coord.xyz);
+
+        // @SearchDiag2Optimization
+        // Fetch both edges at once using bilinear filtering:
+        e = SMAASampleLevelZero(edgesTex, coord.xy).rg;
+        e = SMAADecodeDiagBilinearAccess(e);
+
+        // Non-optimized version:
+        // e.g = SMAASampleLevelZero(edgesTex, coord.xy).g;
+        // e.r = SMAASampleLevelZeroOffset(edgesTex, coord.xy, int2(1, 0)).r;
+
+        coord.w = dot(e, float2(0.5, 0.5));
+    }
+    return coord.zw;
+}
+
+/**
+ * Similar to SMAAArea, this calculates the area corresponding to a certain
+ * diagonal distance and crossing edges 'e'.
+ */
+float2 SMAAAreaDiag(SMAATexture2D(areaTex), float2 dist, float2 e, float offset) {
+    float2 texcoord = mad(float2(SMAA_AREATEX_MAX_DISTANCE_DIAG, SMAA_AREATEX_MAX_DISTANCE_DIAG), e, dist);
+
+    // We do a scale and bias for mapping to texel space:
+    texcoord = mad(SMAA_AREATEX_PIXEL_SIZE, texcoord, 0.5 * SMAA_AREATEX_PIXEL_SIZE);
+
+    // Diagonal areas are on the second half of the texture:
+    texcoord.x += 0.5;
+
+    // Move to proper place, according to the subpixel offset:
+    texcoord.y += SMAA_AREATEX_SUBTEX_SIZE * offset;
+
+    texcoord.y = API_V_COORD(texcoord.y);
+
+    // Do it!
+    return SMAA_AREATEX_SELECT(SMAASampleLevelZero(areaTex, texcoord));
+}
+
+/**
+ * This searches for diagonal patterns and returns the corresponding weights.
+ */
+float2 SMAACalculateDiagWeights(SMAATexture2D(edgesTex), SMAATexture2D(areaTex), float2 texcoord, float2 e, float4 subsampleIndices) {
+    float2 weights = float2(0.0, 0.0);
+
+    // Search for the line ends:
+    float4 d;
+    float2 end;
+    if (e.r > 0.0) {
+        d.xz = SMAASearchDiag1(SMAATexturePass2D(edgesTex), texcoord, float2(-1.0,  1.0), end);
+        d.x += float(end.y > 0.9);
+    } else
+        d.xz = float2(0.0, 0.0);
+    d.yw = SMAASearchDiag1(SMAATexturePass2D(edgesTex), texcoord, float2(1.0, -1.0), end);
+
+    SMAA_BRANCH
+    if (d.x + d.y > 2.0) { // d.x + d.y + 1 > 3
+        // Fetch the crossing edges:
+        float4 coords = mad(float4(-d.x + 0.25, API_V_DIR(d.x), d.y, API_V_DIR(-d.y - 0.25)), SMAA_RT_METRICS.xyxy, texcoord.xyxy);
+        float4 c;
+        c.xy = SMAASampleLevelZeroOffset(edgesTex, coords.xy, int2(-1,  0)).rg;
+        c.zw = SMAASampleLevelZeroOffset(edgesTex, coords.zw, int2( 1,  0)).rg;
+        c.yxwz = SMAADecodeDiagBilinearAccess(c.xyzw);
+
+        // Non-optimized version:
+        // float4 coords = mad(float4(-d.x, d.x, d.y, -d.y), SMAA_RT_METRICS.xyxy, texcoord.xyxy);
+        // float4 c;
+        // c.x = SMAASampleLevelZeroOffset(edgesTex, coords.xy, int2(-1,  0)).g;
+        // c.y = SMAASampleLevelZeroOffset(edgesTex, coords.xy, int2( 0,  0)).r;
+        // c.z = SMAASampleLevelZeroOffset(edgesTex, coords.zw, int2( 1,  0)).g;
+        // c.w = SMAASampleLevelZeroOffset(edgesTex, coords.zw, int2( 1, -1)).r;
+
+        // Merge crossing edges at each side into a single value:
+        float2 cc = mad(float2(2.0, 2.0), c.xz, c.yw);
+
+        // Remove the crossing edge if we didn't found the end of the line:
+        SMAAMovc(bool2(step(0.9, d.zw)), cc, float2(0.0, 0.0));
+
+        // Fetch the areas for this line:
+        weights += SMAAAreaDiag(SMAATexturePass2D(areaTex), d.xy, cc, subsampleIndices.z);
+    }
+
+    // Search for the line ends:
+    d.xz = SMAASearchDiag2(SMAATexturePass2D(edgesTex), texcoord, float2(-1.0, -1.0), end);
+    if (SMAASampleLevelZeroOffset(edgesTex, texcoord, int2(1, 0)).r > 0.0) {
+        d.yw = SMAASearchDiag2(SMAATexturePass2D(edgesTex), texcoord, float2(1.0, 1.0), end);
+        d.y += float(end.y > 0.9);
+    } else
+        d.yw = float2(0.0, 0.0);
+
+    SMAA_BRANCH
+    if (d.x + d.y > 2.0) { // d.x + d.y + 1 > 3
+        // Fetch the crossing edges:
+        float4 coords = mad(float4(-d.x, API_V_DIR(-d.x), d.y, API_V_DIR(d.y)), SMAA_RT_METRICS.xyxy, texcoord.xyxy);
+        float4 c;
+        c.x  = SMAASampleLevelZeroOffset(edgesTex, coords.xy, int2(-1,  0)).g;
+        c.y  = SMAASampleLevelZeroOffset(edgesTex, coords.xy, int2( 0, API_V_DIR(-1))).r;
+        c.zw = SMAASampleLevelZeroOffset(edgesTex, coords.zw, int2( 1,  0)).gr;
+        float2 cc = mad(float2(2.0, 2.0), c.xz, c.yw);
+
+        // Remove the crossing edge if we didn't found the end of the line:
+        SMAAMovc(bool2(step(0.9, d.zw)), cc, float2(0.0, 0.0));
+
+        // Fetch the areas for this line:
+        weights += SMAAAreaDiag(SMAATexturePass2D(areaTex), d.xy, cc, subsampleIndices.w).gr;
+    }
+
+    return weights;
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// Horizontal/Vertical Search Functions
+
+/**
+ * This allows to determine how much length should we add in the last step
+ * of the searches. It takes the bilinearly interpolated edge (see
+ * @PSEUDO_GATHER4), and adds 0, 1 or 2, depending on which edges and
+ * crossing edges are active.
+ */
+float SMAASearchLength(SMAATexture2D(searchTex), float2 e, float offset) {
+    // The texture is flipped vertically, with left and right cases taking half
+    // of the space horizontally:
+    float2 scale = SMAA_SEARCHTEX_SIZE * float2(0.5, -1.0);
+    float2 bias = SMAA_SEARCHTEX_SIZE * float2(offset, 1.0);
+
+    // Scale and bias to access texel centers:
+    scale += float2(-1.0,  1.0);
+    bias  += float2( 0.5, -0.5);
+
+    // Convert from pixel coordinates to texcoords:
+    // (We use SMAA_SEARCHTEX_PACKED_SIZE because the texture is cropped)
+    scale *= 1.0 / SMAA_SEARCHTEX_PACKED_SIZE;
+    bias *= 1.0 / SMAA_SEARCHTEX_PACKED_SIZE;
+
+    float2 coord = mad(scale, e, bias);
+    coord.y = API_V_COORD(coord.y);
+
+    // Lookup the search texture:
+    return SMAA_SEARCHTEX_SELECT(SMAASampleLevelZero(searchTex, coord));
+}
+
+/**
+ * Horizontal/vertical search functions for the 2nd pass.
+ */
+float SMAASearchXLeft(SMAATexture2D(edgesTex), SMAATexture2D(searchTex), float2 texcoord, float end) {
+    /**
+     * @PSEUDO_GATHER4
+     * This texcoord has been offset by (-0.25, -0.125) in the vertex shader to
+     * sample between edge, thus fetching four edges in a row.
+     * Sampling with different offsets in each direction allows to disambiguate
+     * which edges are active from the four fetched ones.
+     */
+    float2 e = float2(0.0, 1.0);
+    while (texcoord.x > end &&
+           e.g > 0.8281 && // Is there some edge not activated?
+           e.r == 0.0) { // Or is there a crossing edge that breaks the line?
+        e = SMAASampleLevelZero(edgesTex, texcoord).rg;
+        texcoord = mad(-float2(2.0, 0.0), SMAA_RT_METRICS.xy, texcoord);
+    }
+
+    float offset = mad(-(255.0 / 127.0), SMAASearchLength(SMAATexturePass2D(searchTex), e, 0.0), 3.25);
+    return mad(SMAA_RT_METRICS.x, offset, texcoord.x);
+
+    // Non-optimized version:
+    // We correct the previous (-0.25, -0.125) offset we applied:
+    // texcoord.x += 0.25 * SMAA_RT_METRICS.x;
+
+    // The searches are bias by 1, so adjust the coords accordingly:
+    // texcoord.x += SMAA_RT_METRICS.x;
+
+    // Disambiguate the length added by the last step:
+    // texcoord.x += 2.0 * SMAA_RT_METRICS.x; // Undo last step
+    // texcoord.x -= SMAA_RT_METRICS.x * (255.0 / 127.0) * SMAASearchLength(SMAATexturePass2D(searchTex), e, 0.0);
+    // return mad(SMAA_RT_METRICS.x, offset, texcoord.x);
+}
+
+float SMAASearchXRight(SMAATexture2D(edgesTex), SMAATexture2D(searchTex), float2 texcoord, float end) {
+    float2 e = float2(0.0, 1.0);
+    while (texcoord.x < end &&
+           e.g > 0.8281 && // Is there some edge not activated?
+           e.r == 0.0) { // Or is there a crossing edge that breaks the line?
+        e = SMAASampleLevelZero(edgesTex, texcoord).rg;
+        texcoord = mad(float2(2.0, 0.0), SMAA_RT_METRICS.xy, texcoord);
+    }
+    float offset = mad(-(255.0 / 127.0), SMAASearchLength(SMAATexturePass2D(searchTex), e, 0.5), 3.25);
+    return mad(-SMAA_RT_METRICS.x, offset, texcoord.x);
+}
+
+float SMAASearchYUp(SMAATexture2D(edgesTex), SMAATexture2D(searchTex), float2 texcoord, float end) {
+    float2 e = float2(1.0, 0.0);
+    while (API_V_BELOW(texcoord.y, end) &&
+           e.r > 0.8281 && // Is there some edge not activated?
+           e.g == 0.0) { // Or is there a crossing edge that breaks the line?
+        e = SMAASampleLevelZero(edgesTex, texcoord).rg;
+        texcoord = mad(-float2(0.0, API_V_DIR(2.0)), SMAA_RT_METRICS.xy, texcoord);
+    }
+    float offset = mad(-(255.0 / 127.0), SMAASearchLength(SMAATexturePass2D(searchTex), e.gr, 0.0), 3.25);
+    return mad(SMAA_RT_METRICS.y, API_V_DIR(offset), texcoord.y);
+}
+
+float SMAASearchYDown(SMAATexture2D(edgesTex), SMAATexture2D(searchTex), float2 texcoord, float end) {
+    float2 e = float2(1.0, 0.0);
+    while (API_V_ABOVE(texcoord.y, end) &&
+           e.r > 0.8281 && // Is there some edge not activated?
+           e.g == 0.0) { // Or is there a crossing edge that breaks the line?
+        e = SMAASampleLevelZero(edgesTex, texcoord).rg;
+        texcoord = mad(float2(0.0, API_V_DIR(2.0)), SMAA_RT_METRICS.xy, texcoord);
+    }
+    float offset = mad(-(255.0 / 127.0), SMAASearchLength(SMAATexturePass2D(searchTex), e.gr, 0.5), 3.25);
+    return mad(-SMAA_RT_METRICS.y, API_V_DIR(offset), texcoord.y);
+}
+
+/**
+ * Ok, we have the distance and both crossing edges. So, what are the areas
+ * at each side of current edge?
+ */
+float2 SMAAArea(SMAATexture2D(areaTex), float2 dist, float e1, float e2, float offset) {
+    // Rounding prevents precision errors of bilinear filtering:
+    float2 texcoord = mad(float2(SMAA_AREATEX_MAX_DISTANCE, SMAA_AREATEX_MAX_DISTANCE), round(4.0 * float2(e1, e2)), dist);
+
+    // We do a scale and bias for mapping to texel space:
+    texcoord = mad(SMAA_AREATEX_PIXEL_SIZE, texcoord, 0.5 * SMAA_AREATEX_PIXEL_SIZE);
+
+    // Move to proper place, according to the subpixel offset:
+    texcoord.y = mad(SMAA_AREATEX_SUBTEX_SIZE, offset, texcoord.y);
+
+    texcoord.y = API_V_COORD(texcoord.y);
+
+    // Do it!
+    return SMAA_AREATEX_SELECT(SMAASampleLevelZero(areaTex, texcoord));
+}
+
+//-----------------------------------------------------------------------------
+// Corner Detection Functions
+
+void SMAADetectHorizontalCornerPattern(SMAATexture2D(edgesTex), inout float2 weights, float4 texcoord, float2 d) {
+    #if !defined(SMAA_DISABLE_CORNER_DETECTION)
+    float2 leftRight = step(d.xy, d.yx);
+    float2 rounding = (1.0 - SMAA_CORNER_ROUNDING_NORM) * leftRight;
+
+    rounding /= leftRight.x + leftRight.y; // Reduce blending for pixels in the center of a line.
+
+    float2 factor = float2(1.0, 1.0);
+    factor.x -= rounding.x * SMAASampleLevelZeroOffset(edgesTex, texcoord.xy, int2(0,  API_V_DIR(1))).r;
+    factor.x -= rounding.y * SMAASampleLevelZeroOffset(edgesTex, texcoord.zw, int2(1,  API_V_DIR(1))).r;
+    factor.y -= rounding.x * SMAASampleLevelZeroOffset(edgesTex, texcoord.xy, int2(0, API_V_DIR(-2))).r;
+    factor.y -= rounding.y * SMAASampleLevelZeroOffset(edgesTex, texcoord.zw, int2(1, API_V_DIR(-2))).r;
+
+    weights *= saturate(factor);
+    #endif
+}
+
+void SMAADetectVerticalCornerPattern(SMAATexture2D(edgesTex), inout float2 weights, float4 texcoord, float2 d) {
+    #if !defined(SMAA_DISABLE_CORNER_DETECTION)
+    float2 leftRight = step(d.xy, d.yx);
+    float2 rounding = (1.0 - SMAA_CORNER_ROUNDING_NORM) * leftRight;
+
+    rounding /= leftRight.x + leftRight.y;
+
+    float2 factor = float2(1.0, 1.0);
+    factor.x -= rounding.x * SMAASampleLevelZeroOffset(edgesTex, texcoord.xy, int2( 1, 0)).g;
+    factor.x -= rounding.y * SMAASampleLevelZeroOffset(edgesTex, texcoord.zw, int2( 1, API_V_DIR(1))).g;
+    factor.y -= rounding.x * SMAASampleLevelZeroOffset(edgesTex, texcoord.xy, int2(-2, 0)).g;
+    factor.y -= rounding.y * SMAASampleLevelZeroOffset(edgesTex, texcoord.zw, int2(-2, API_V_DIR(1))).g;
+
+    weights *= saturate(factor);
+    #endif
+}
+
+//-----------------------------------------------------------------------------
+// Blending Weight Calculation Pixel Shader (Second Pass)
+
+float4 SMAABlendingWeightCalculationPS(float2 texcoord,
+                                       float2 pixcoord,
+                                       float4 offset[3],
+                                       SMAATexture2D(edgesTex),
+                                       SMAATexture2D(areaTex),
+                                       SMAATexture2D(searchTex),
+                                       float4 subsampleIndices) { // Just pass zero for SMAA 1x, see @SUBSAMPLE_INDICES.
+    float4 weights = float4(0.0, 0.0, 0.0, 0.0);
+
+    float2 e = SMAASample(edgesTex, texcoord).rg;
+
+    SMAA_BRANCH
+    if (e.g > 0.0) { // Edge at north
+        #if !defined(SMAA_DISABLE_DIAG_DETECTION)
+        // Diagonals have both north and west edges, so searching for them in
+        // one of the boundaries is enough.
+        weights.rg = SMAACalculateDiagWeights(SMAATexturePass2D(edgesTex), SMAATexturePass2D(areaTex), texcoord, e, subsampleIndices);
+
+        // We give priority to diagonals, so if we find a diagonal we skip
+        // horizontal/vertical processing.
+        SMAA_BRANCH
+        if (weights.r == -weights.g) { // weights.r + weights.g == 0.0
+        #endif
+
+        float2 d;
+
+        // Find the distance to the left:
+        float3 coords;
+        coords.x = SMAASearchXLeft(SMAATexturePass2D(edgesTex), SMAATexturePass2D(searchTex), offset[0].xy, offset[2].x);
+        coords.y = offset[1].y; // offset[1].y = texcoord.y - 0.25 * SMAA_RT_METRICS.y (@CROSSING_OFFSET)
+        d.x = coords.x;
+
+        // Now fetch the left crossing edges, two at a time using bilinear
+        // filtering. Sampling at -0.25 (see @CROSSING_OFFSET) enables to
+        // discern what value each edge has:
+        float e1 = SMAASampleLevelZero(edgesTex, coords.xy).r;
+
+        // Find the distance to the right:
+        coords.z = SMAASearchXRight(SMAATexturePass2D(edgesTex), SMAATexturePass2D(searchTex), offset[0].zw, offset[2].y);
+        d.y = coords.z;
+
+        // We want the distances to be in pixel units (doing this here allow to
+        // better interleave arithmetic and memory accesses):
+        d = abs(round(mad(SMAA_RT_METRICS.zz, d, -pixcoord.xx)));
+
+        // SMAAArea below needs a sqrt, as the areas texture is compressed
+        // quadratically:
+        float2 sqrt_d = sqrt(d);
+
+        // Fetch the right crossing edges:
+        float e2 = SMAASampleLevelZeroOffset(edgesTex, coords.zy, int2(1, 0)).r;
+
+        // Ok, we know how this pattern looks like, now it is time for getting
+        // the actual area:
+        weights.rg = SMAAArea(SMAATexturePass2D(areaTex), sqrt_d, e1, e2, subsampleIndices.y);
+
+        // Fix corners:
+        coords.y = texcoord.y;
+        SMAADetectHorizontalCornerPattern(SMAATexturePass2D(edgesTex), weights.rg, coords.xyzy, d);
+
+        #if !defined(SMAA_DISABLE_DIAG_DETECTION)
+        } else
+            e.r = 0.0; // Skip vertical processing.
+        #endif
+    }
+
+    SMAA_BRANCH
+    if (e.r > 0.0) { // Edge at west
+        float2 d;
+
+        // Find the distance to the top:
+        float3 coords;
+        coords.y = SMAASearchYUp(SMAATexturePass2D(edgesTex), SMAATexturePass2D(searchTex), offset[1].xy, offset[2].z);
+        coords.x = offset[0].x; // offset[1].x = texcoord.x - 0.25 * SMAA_RT_METRICS.x;
+        d.x = coords.y;
+
+        // Fetch the top crossing edges:
+        float e1 = SMAASampleLevelZero(edgesTex, coords.xy).g;
+
+        // Find the distance to the bottom:
+        coords.z = SMAASearchYDown(SMAATexturePass2D(edgesTex), SMAATexturePass2D(searchTex), offset[1].zw, offset[2].w);
+        d.y = coords.z;
+
+        // We want the distances to be in pixel units:
+        d = abs(round(mad(SMAA_RT_METRICS.ww, d, -pixcoord.yy)));
+
+        // SMAAArea below needs a sqrt, as the areas texture is compressed
+        // quadratically:
+        float2 sqrt_d = sqrt(d);
+
+        // Fetch the bottom crossing edges:
+        float e2 = SMAASampleLevelZeroOffset(edgesTex, coords.xz, int2(0, API_V_DIR(1))).g;
+
+        // Get the area for this direction:
+        weights.ba = SMAAArea(SMAATexturePass2D(areaTex), sqrt_d, e1, e2, subsampleIndices.x);
+
+        // Fix corners:
+        coords.x = texcoord.x;
+        SMAADetectVerticalCornerPattern(SMAATexturePass2D(edgesTex), weights.ba, coords.xyxz, d);
+    }
+
+    return weights;
+}
+
+//-----------------------------------------------------------------------------
+// Neighborhood Blending Pixel Shader (Third Pass)
+
+float4 SMAANeighborhoodBlendingPS(float2 texcoord,
+                                  float4 offset,
+                                  SMAATexture2D(colorTex),
+                                  SMAATexture2D(blendTex)
+                                  #if SMAA_REPROJECTION
+                                  , SMAATexture2D(velocityTex)
+                                  #endif
+                                  ) {
+    // Fetch the blending weights for current pixel:
+    float4 a;
+    a.x = SMAASample(blendTex, offset.xy).a; // Right
+    a.y = SMAASample(blendTex, offset.zw).g; // Top
+    a.wz = SMAASample(blendTex, texcoord).xz; // Bottom / Left
+
+    // Is there any blending weight with a value greater than 0.0?
+    SMAA_BRANCH
+    if (dot(a, float4(1.0, 1.0, 1.0, 1.0)) < 1e-5) {
+        float4 color = SMAASampleLevelZero(colorTex, texcoord);
+
+        #if SMAA_REPROJECTION
+        float2 velocity = SMAA_DECODE_VELOCITY(SMAASampleLevelZero(velocityTex, texcoord));
+
+        // Pack velocity into the alpha channel:
+        color.a = sqrt(5.0 * length(velocity));
+        #endif
+
+        return color;
+    } else {
+        bool h = max(a.x, a.z) > max(a.y, a.w); // max(horizontal) > max(vertical)
+
+        // Calculate the blending offsets:
+        float4 blendingOffset = float4(0.0, API_V_DIR(a.y), 0.0, API_V_DIR(a.w));
+        float2 blendingWeight = a.yw;
+        SMAAMovc(bool4(h, h, h, h), blendingOffset, float4(a.x, 0.0, a.z, 0.0));
+        SMAAMovc(bool2(h, h), blendingWeight, a.xz);
+        blendingWeight /= dot(blendingWeight, float2(1.0, 1.0));
+
+        // Calculate the texture coordinates:
+        float4 blendingCoord = mad(blendingOffset, float4(SMAA_RT_METRICS.xy, -SMAA_RT_METRICS.xy), texcoord.xyxy);
+
+        // We exploit bilinear filtering to mix current pixel with the chosen
+        // neighbor:
+        float4 color = blendingWeight.x * SMAASampleLevelZero(colorTex, blendingCoord.xy);
+        color += blendingWeight.y * SMAASampleLevelZero(colorTex, blendingCoord.zw);
+
+        #if SMAA_REPROJECTION
+        // Antialias velocity for proper reprojection in a later stage:
+        float2 velocity = blendingWeight.x * SMAA_DECODE_VELOCITY(SMAASampleLevelZero(velocityTex, blendingCoord.xy));
+        velocity += blendingWeight.y * SMAA_DECODE_VELOCITY(SMAASampleLevelZero(velocityTex, blendingCoord.zw));
+
+        // Pack velocity into the alpha channel:
+        color.a = sqrt(5.0 * length(velocity));
+        #endif
+
+        return color;
+    }
+}
+
+//-----------------------------------------------------------------------------
+// Temporal Resolve Pixel Shader (Optional Pass)
+
+float4 SMAAResolvePS(float2 texcoord,
+                     SMAATexture2D(currentColorTex),
+                     SMAATexture2D(previousColorTex)
+                     #if SMAA_REPROJECTION
+                     , SMAATexture2D(velocityTex)
+                     #endif
+                     ) {
+    #if SMAA_REPROJECTION
+    // Velocity is assumed to be calculated for motion blur, so we need to
+    // inverse it for reprojection:
+    float2 velocity = -SMAA_DECODE_VELOCITY(SMAASamplePoint(velocityTex, texcoord).rg);
+
+    // Fetch current pixel:
+    float4 current = SMAASamplePoint(currentColorTex, texcoord);
+
+    // Reproject current coordinates and fetch previous pixel:
+    float4 previous = SMAASamplePoint(previousColorTex, texcoord + velocity);
+
+    // Attenuate the previous pixel if the velocity is different:
+    float delta = abs(current.a * current.a - previous.a * previous.a) / 5.0;
+    float weight = 0.5 * saturate(1.0 - sqrt(delta) * SMAA_REPROJECTION_WEIGHT_SCALE);
+
+    // Blend the pixels according to the calculated weight:
+    return lerp(current, previous, weight);
+    #else
+    // Just blend the pixels:
+    float4 current = SMAASamplePoint(currentColorTex, texcoord);
+    float4 previous = SMAASamplePoint(previousColorTex, texcoord);
+    return lerp(current, previous, 0.5);
+    #endif
+}
+
+//-----------------------------------------------------------------------------
+// Separate Multisamples Pixel Shader (Optional Pass)
+
+#ifdef SMAALoad
+void SMAASeparatePS(float4 position,
+                    float2 texcoord,
+                    out float4 target0,
+                    out float4 target1,
+                    SMAATexture2DMS2(colorTexMS)) {
+    int2 pos = int2(position.xy);
+    target0 = SMAALoad(colorTexMS, pos, 0);
+    target1 = SMAALoad(colorTexMS, pos, 1);
+}
+#endif
+
+//-----------------------------------------------------------------------------
+#endif // SMAA_INCLUDE_PS
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAABlendWeightsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAABlendWeightsF.glsl
new file mode 100644
index 0000000000..3332c5f58f
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAABlendWeightsF.glsl
@@ -0,0 +1,57 @@
+/**
+ * @file SMAABlendWeightsF.glsl
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+out vec4 frag_color;
+
+in vec2 vary_texcoord0;
+in vec2 vary_pixcoord;
+in vec4 vary_offset[3];
+
+uniform sampler2D edgesTex;
+uniform sampler2D areaTex;
+uniform sampler2D searchTex;
+
+vec4 SMAABlendingWeightCalculationPS(vec2 texcoord,
+                                       vec2 pixcoord,
+                                       vec4 offset[3],
+                                       sampler2D edgesTex,
+                                       sampler2D areaTex,
+                                       sampler2D searchTex,
+                                       vec4 subsampleIndices);
+
+void main()
+{
+    frag_color = SMAABlendingWeightCalculationPS(vary_texcoord0,
+                                                 vary_pixcoord,
+                                                 vary_offset,
+                                                 edgesTex,
+                                                 areaTex,
+                                                 searchTex,
+                                                 vec4(0.0)
+                                                 );
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAABlendWeightsV.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAABlendWeightsV.glsl
new file mode 100644
index 0000000000..52f85ef30c
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAABlendWeightsV.glsl
@@ -0,0 +1,51 @@
+/**
+ * @file SMAABlendWeightsV.glsl
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+uniform mat4 modelview_projection_matrix;
+
+in vec3 position;
+
+out vec2 vary_texcoord0;
+out vec2 vary_pixcoord;
+out vec4 vary_offset[3];
+
+#define float4 vec4
+#define float2 vec2
+void SMAABlendingWeightCalculationVS(float2 texcoord,
+                                     out float2 pixcoord,
+                                     out float4 offset[3]);
+
+void main()
+{
+    gl_Position = vec4(position.xyz, 1.0);
+    vary_texcoord0 = (gl_Position.xy*0.5+0.5);
+
+    SMAABlendingWeightCalculationVS(vary_texcoord0,
+                                    vary_pixcoord,
+                                    vary_offset);
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAAEdgeDetectF.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAAEdgeDetectF.glsl
new file mode 100644
index 0000000000..0a8cd4a4ea
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAAEdgeDetectF.glsl
@@ -0,0 +1,59 @@
+/**
+ * @file SMAAEdgeDetectF.glsl
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+out vec4 frag_color;
+
+in vec2 vary_texcoord0;
+in vec4 vary_offset[3];
+
+uniform sampler2D diffuseRect;
+#if SMAA_PREDICATION
+uniform sampler2D predicationTex;
+#endif
+
+#define float4 vec4
+#define float2 vec2
+#define SMAATexture2D(tex) sampler2D tex
+
+float2 SMAAColorEdgeDetectionPS(float2 texcoord,
+                                float4 offset[3],
+                                SMAATexture2D(colorTex)
+                                #if SMAA_PREDICATION
+                                , SMAATexture2D(predicationTex)
+                                #endif
+                                );
+
+void main()
+{
+    vec2 val = SMAAColorEdgeDetectionPS(vary_texcoord0,
+                                          vary_offset,
+                                          diffuseRect
+                                          #if SMAA_PREDICATION
+                                          , predicationTex
+                                          #endif
+                                          );
+    frag_color = float4(val,0.0,0.0);
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAAEdgeDetectV.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAAEdgeDetectV.glsl
new file mode 100644
index 0000000000..7c0184bfc4
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAAEdgeDetectV.glsl
@@ -0,0 +1,45 @@
+/**
+ * @file SMAAEdgeDetectV.glsl
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+uniform mat4 modelview_projection_matrix;
+
+in vec3 position;
+
+out vec2 vary_texcoord0;
+out vec4 vary_offset[3];
+
+#define float4 vec4
+#define float2 vec2
+void SMAAEdgeDetectionVS(float2 texcoord,
+                         out float4 offset[3]);
+
+void main()
+{
+    gl_Position = vec4(position.xyz, 1.0);
+    vary_texcoord0 = (gl_Position.xy*0.5+0.5);
+
+    SMAAEdgeDetectionVS(vary_texcoord0, vary_offset);
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAANeighborhoodBlendF.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAANeighborhoodBlendF.glsl
new file mode 100644
index 0000000000..3276405447
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAANeighborhoodBlendF.glsl
@@ -0,0 +1,63 @@
+/**
+ * @file SMAANeighborhoodBlendF.glsl
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+out vec4 frag_color;
+
+in vec2 vary_texcoord0;
+in vec4 vary_offset;
+
+uniform sampler2D diffuseRect;
+uniform sampler2D blendTex;
+#if SMAA_REPROJECTION
+uniform sampler2D velocityTex;
+#endif
+
+#define float4 vec4
+#define float2 vec2
+#define SMAATexture2D(tex) sampler2D tex
+
+float4 SMAANeighborhoodBlendingPS(float2 texcoord,
+                                  float4 offset,
+                                  SMAATexture2D(colorTex),
+                                  SMAATexture2D(blendTex)
+                                  #if SMAA_REPROJECTION
+                                  , SMAATexture2D(velocityTex)
+                                  #endif
+                                  );
+
+void main()
+{
+    frag_color = SMAANeighborhoodBlendingPS(vary_texcoord0,
+                                            vary_offset,
+                                            diffuseRect,
+                                            blendTex
+                                            #if SMAA_REPROJECTION
+                                            , velocityTex
+                                            #endif
+                                            );
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/SMAANeighborhoodBlendV.glsl b/indra/newview/app_settings/shaders/class1/deferred/SMAANeighborhoodBlendV.glsl
new file mode 100644
index 0000000000..7ea1ac61e3
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/SMAANeighborhoodBlendV.glsl
@@ -0,0 +1,47 @@
+/**
+ * @file SMAANeighborhoodBlendV.glsl
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+uniform mat4 modelview_projection_matrix;
+
+in vec3 position;
+
+out vec2 vary_texcoord0;
+out vec4 vary_offset;
+
+#define float4 vec4
+#define float2 vec2
+void SMAANeighborhoodBlendingVS(float2 texcoord,
+                                out float4 offset);
+
+void main()
+{
+    gl_Position = vec4(position.xyz, 1.0);
+    vary_texcoord0 = (gl_Position.xy*0.5+0.5);
+
+    SMAANeighborhoodBlendingVS(vary_texcoord0, vary_offset);
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fxaaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fxaaF.glsl
index 16e23a3da7..655cb1ea97 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fxaaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fxaaF.glsl
@@ -32,7 +32,7 @@ out vec4 frag_color;
 
 #define FXAA_PC 1
 //#define FXAA_GLSL_130 1
-#define FXAA_QUALITY__PRESET 12
+//#define FXAA_QUALITY__PRESET 12
 
 /*============================================================================
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
index a0eb6cfbb8..befd2ae6da 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
@@ -28,141 +28,13 @@
 out vec4 frag_color;
 
 uniform sampler2D diffuseRect;
-uniform sampler2D exposureMap;
 
+uniform float gamma;
 uniform vec2 screen_res;
 in vec2 vary_fragcoord;
 
 vec3 linear_to_srgb(vec3 cl);
 
-//===============================================================
-// tone mapping taken from Khronos sample implementation
-//===============================================================
-
-// sRGB => XYZ => D65_2_D60 => AP1 => RRT_SAT
-const mat3 ACESInputMat = mat3
-(
-    0.59719, 0.07600, 0.02840,
-    0.35458, 0.90834, 0.13383,
-    0.04823, 0.01566, 0.83777
-);
-
-
-// ODT_SAT => XYZ => D60_2_D65 => sRGB
-const mat3 ACESOutputMat = mat3
-(
-    1.60475, -0.10208, -0.00327,
-    -0.53108,  1.10813, -0.07276,
-    -0.07367, -0.00605,  1.07602
-);
-
-// ACES tone map (faster approximation)
-// see: https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/
-vec3 toneMapACES_Narkowicz(vec3 color)
-{
-    const float A = 2.51;
-    const float B = 0.03;
-    const float C = 2.43;
-    const float D = 0.59;
-    const float E = 0.14;
-    return clamp((color * (A * color + B)) / (color * (C * color + D) + E), 0.0, 1.0);
-}
-
-
-// ACES filmic tone map approximation
-// see https://github.com/TheRealMJP/BakingLab/blob/master/BakingLab/ACES.hlsl
-vec3 RRTAndODTFit(vec3 color)
-{
-    vec3 a = color * (color + 0.0245786) - 0.000090537;
-    vec3 b = color * (0.983729 * color + 0.4329510) + 0.238081;
-    return a / b;
-}
-
-
-// tone mapping
-vec3 toneMapACES_Hill(vec3 color)
-{
-    color = ACESInputMat * color;
-
-    // Apply RRT and ODT
-    color = RRTAndODTFit(color);
-
-    color = ACESOutputMat * color;
-
-    // Clamp to [0, 1]
-    color = clamp(color, 0.0, 1.0);
-
-    return color;
-}
-
-uniform float exposure;
-uniform float gamma;
-uniform float aces_mix;
-
-vec3 toneMap(vec3 color)
-{
-#ifndef NO_POST
-    float exp_scale = texture(exposureMap, vec2(0.5,0.5)).r;
-
-    color *= exposure * exp_scale;
-
-    // mix ACES and Linear here as a compromise to avoid over-darkening legacy content
-    color = mix(toneMapACES_Hill(color), color, aces_mix);
-#endif
-
-    return color;
-}
-
-//===============================================================
-
-//=================================
-// borrowed noise from:
-//  <https://www.shadertoy.com/view/4dS3Wd>
-//  By Morgan McGuire @morgan3d, http://graphicscodex.com
-//
-float hash(float n) { return fract(sin(n) * 1e4); }
-float hash(vec2 p) { return fract(1e4 * sin(17.0 * p.x + p.y * 0.1) * (0.1 + abs(sin(p.y * 13.0 + p.x)))); }
-
-float noise(float x) {
-    float i = floor(x);
-    float f = fract(x);
-    float u = f * f * (3.0 - 2.0 * f);
-    return mix(hash(i), hash(i + 1.0), u);
-}
-
-float noise(vec2 x) {
-    vec2 i = floor(x);
-    vec2 f = fract(x);
-
-    // Four corners in 2D of a tile
-    float a = hash(i);
-    float b = hash(i + vec2(1.0, 0.0));
-    float c = hash(i + vec2(0.0, 1.0));
-    float d = hash(i + vec2(1.0, 1.0));
-
-    // Simple 2D lerp using smoothstep envelope between the values.
-    // return vec3(mix(mix(a, b, smoothstep(0.0, 1.0, f.x)),
-    //          mix(c, d, smoothstep(0.0, 1.0, f.x)),
-    //          smoothstep(0.0, 1.0, f.y)));
-
-    // Same code, with the clamps in smoothstep and common subexpressions
-    // optimized away.
-    vec2 u = f * f * (3.0 - 2.0 * f);
-    return mix(a, b, u.x) + (c - a) * u.y * (1.0 - u.x) + (d - b) * u.x * u.y;
-}
-
-//=============================
-
-void debugExposure(inout vec3 color)
-{
-    float exp_scale = texture(exposureMap, vec2(0.5,0.5)).r;
-    exp_scale *= 0.5;
-    if (abs(vary_fragcoord.y-exp_scale) < 0.01 && vary_fragcoord.x < 0.1)
-    {
-        color = vec3(1,0,0);
-    }
-}
-
 vec3 legacyGamma(vec3 color)
 {
     vec3 c = 1. - clamp(color, vec3(0.), vec3(1.));
@@ -175,23 +47,12 @@ void main()
 {
     //this is the one of the rare spots where diffuseRect contains linear color values (not sRGB)
     vec4 diff = texture(diffuseRect, vary_fragcoord);
+    diff.rgb = linear_to_srgb(diff.rgb);
 
 #ifdef LEGACY_GAMMA
-    diff.rgb = linear_to_srgb(diff.rgb);
     diff.rgb = legacyGamma(diff.rgb);
-#else
-#ifndef NO_POST
-    diff.rgb = toneMap(diff.rgb);
 #endif
-    diff.rgb = linear_to_srgb(diff.rgb);
-#endif
-
-    vec2 tc = vary_fragcoord.xy*screen_res*4.0;
-    vec3 seed = (diff.rgb+vec3(1.0))*vec3(tc.xy, tc.x+tc.y);
-    vec3 nz = vec3(noise(seed.rg), noise(seed.gb), noise(seed.rb));
-    diff.rgb += nz*0.003;
 
-    //debugExposure(diff.rgb);
     frag_color = max(diff, vec4(0));
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredNoDoFF.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredNoDoFF.glsl
index 07384ebe9b..32b0a1ac8e 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredNoDoFF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredNoDoFF.glsl
@@ -33,10 +33,57 @@ uniform sampler2D depthMap;
 uniform vec2 screen_res;
 in vec2 vary_fragcoord;
 
+//=================================
+// borrowed noise from:
+//  <https://www.shadertoy.com/view/4dS3Wd>
+//  By Morgan McGuire @morgan3d, http://graphicscodex.com
+//
+float hash(float n) { return fract(sin(n) * 1e4); }
+float hash(vec2 p) { return fract(1e4 * sin(17.0 * p.x + p.y * 0.1) * (0.1 + abs(sin(p.y * 13.0 + p.x)))); }
+
+float noise(float x) {
+    float i = floor(x);
+    float f = fract(x);
+    float u = f * f * (3.0 - 2.0 * f);
+    return mix(hash(i), hash(i + 1.0), u);
+}
+
+float noise(vec2 x) {
+    vec2 i = floor(x);
+    vec2 f = fract(x);
+
+    // Four corners in 2D of a tile
+    float a = hash(i);
+    float b = hash(i + vec2(1.0, 0.0));
+    float c = hash(i + vec2(0.0, 1.0));
+    float d = hash(i + vec2(1.0, 1.0));
+
+    // Simple 2D lerp using smoothstep envelope between the values.
+    // return vec3(mix(mix(a, b, smoothstep(0.0, 1.0, f.x)),
+    //          mix(c, d, smoothstep(0.0, 1.0, f.x)),
+    //          smoothstep(0.0, 1.0, f.y)));
+
+    // Same code, with the clamps in smoothstep and common subexpressions
+    // optimized away.
+    vec2 u = f * f * (3.0 - 2.0 * f);
+    return mix(a, b, u.x) + (c - a) * u.y * (1.0 - u.x) + (d - b) * u.x * u.y;
+}
+
+//=============================
+
+
+
 void main()
 {
     vec4 diff = texture(diffuseRect, vary_fragcoord.xy);
 
+#ifdef HAS_NOISE
+    vec2 tc = vary_fragcoord.xy*screen_res*4.0;
+    vec3 seed = (diff.rgb+vec3(1.0))*vec3(tc.xy, tc.x+tc.y);
+    vec3 nz = vec3(noise(seed.rg), noise(seed.gb), noise(seed.rb));
+    diff.rgb += nz*0.003;
+#endif
+
     frag_color = diff;
 
     gl_FragDepth = texture(depthMap, vary_fragcoord.xy).r;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredTonemap.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredTonemap.glsl
new file mode 100644
index 0000000000..fc6d4d7727
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredTonemap.glsl
@@ -0,0 +1,178 @@
+/**
+ * @file postDeferredTonemap.glsl
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+out vec4 frag_color;
+
+uniform sampler2D diffuseRect;
+uniform sampler2D exposureMap;
+
+uniform vec2 screen_res;
+in vec2 vary_fragcoord;
+
+vec3 linear_to_srgb(vec3 cl);
+
+//===============================================================
+// tone mapping taken from Khronos sample implementation
+//===============================================================
+
+// sRGB => XYZ => D65_2_D60 => AP1 => RRT_SAT
+const mat3 ACESInputMat = mat3
+(
+    0.59719, 0.07600, 0.02840,
+    0.35458, 0.90834, 0.13383,
+    0.04823, 0.01566, 0.83777
+);
+
+
+// ODT_SAT => XYZ => D60_2_D65 => sRGB
+const mat3 ACESOutputMat = mat3
+(
+    1.60475, -0.10208, -0.00327,
+    -0.53108,  1.10813, -0.07276,
+    -0.07367, -0.00605,  1.07602
+);
+
+// ACES tone map (faster approximation)
+// see: https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/
+vec3 toneMapACES_Narkowicz(vec3 color)
+{
+    const float A = 2.51;
+    const float B = 0.03;
+    const float C = 2.43;
+    const float D = 0.59;
+    const float E = 0.14;
+    return clamp((color * (A * color + B)) / (color * (C * color + D) + E), 0.0, 1.0);
+}
+
+
+// ACES filmic tone map approximation
+// see https://github.com/TheRealMJP/BakingLab/blob/master/BakingLab/ACES.hlsl
+vec3 RRTAndODTFit(vec3 color)
+{
+    vec3 a = color * (color + 0.0245786) - 0.000090537;
+    vec3 b = color * (0.983729 * color + 0.4329510) + 0.238081;
+    return a / b;
+}
+
+
+// tone mapping
+vec3 toneMapACES_Hill(vec3 color)
+{
+    color = ACESInputMat * color;
+
+    // Apply RRT and ODT
+    color = RRTAndODTFit(color);
+
+    color = ACESOutputMat * color;
+
+    // Clamp to [0, 1]
+    color = clamp(color, 0.0, 1.0);
+
+    return color;
+}
+
+// Khronos Neutral tonemapping
+// https://github.com/KhronosGroup/ToneMapping/tree/main
+// Input color is non-negative and resides in the Linear Rec. 709 color space.
+// Output color is also Linear Rec. 709, but in the [0, 1] range.
+vec3 PBRNeutralToneMapping( vec3 color )
+{
+  const float startCompression = 0.8 - 0.04;
+  const float desaturation = 0.15;
+
+  float x = min(color.r, min(color.g, color.b));
+  float offset = x < 0.08 ? x - 6.25 * x * x : 0.04;
+  color -= offset;
+
+  float peak = max(color.r, max(color.g, color.b));
+  if (peak < startCompression) return color;
+
+  const float d = 1. - startCompression;
+  float newPeak = 1. - d * d / (peak + d - startCompression);
+  color *= newPeak / peak;
+
+  float g = 1. - 1. / (desaturation * (peak - newPeak) + 1.);
+  return mix(color, newPeak * vec3(1, 1, 1), g);
+}
+
+uniform float exposure;
+uniform float tonemap_mix;
+uniform int tonemap_type;
+
+vec3 toneMap(vec3 color)
+{
+#ifndef NO_POST
+    float exp_scale = texture(exposureMap, vec2(0.5,0.5)).r;
+
+    color *= exposure * exp_scale;
+
+    vec3 clamped_color = clamp(color.rgb, vec3(0.0), vec3(1.0));
+
+    switch(tonemap_type)
+    {
+    case 0:
+        color = PBRNeutralToneMapping(color);
+        break;
+    case 1:
+        color = toneMapACES_Hill(color);
+        break;
+    }
+
+    // mix tonemapped and linear here to provide adjustment
+    color = mix(clamped_color, color, tonemap_mix);
+#endif
+
+    return color;
+}
+
+//===============================================================
+
+void debugExposure(inout vec3 color)
+{
+    float exp_scale = texture(exposureMap, vec2(0.5,0.5)).r;
+    exp_scale *= 0.5;
+    if (abs(vary_fragcoord.y-exp_scale) < 0.01 && vary_fragcoord.x < 0.1)
+    {
+        color = vec3(1,0,0);
+    }
+}
+
+void main()
+{
+    //this is the one of the rare spots where diffuseRect contains linear color values (not sRGB)
+    vec4 diff = texture(diffuseRect, vary_fragcoord);
+
+#ifndef NO_POST
+    diff.rgb = toneMap(diff.rgb);
+#else
+    diff.rgb = clamp(diff.rgb, vec3(0.0), vec3(1.0));
+#endif
+
+    //debugExposure(diff.rgb);
+    frag_color = max(diff, vec4(0));
+}
+