SL-18809: Merge 'DRTVWR-559' of secondlife/viewer into sl-18809

15 files changed, 148 insertions, 193 deletions

diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index bea54f0b69..7a0a3428b3 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -9558,7 +9558,7 @@
   <key>RenderHoverGlowEnable</key>
   <map>
     <key>Comment</key>
-    <string>Show glow effect when hovering on interactive objects.</string>
+    <string>DEPRECATED --- Show glow effect when hovering on interactive objects.</string>
     <key>Persist</key>
     <integer>1</integer>
     <key>Type</key>
@@ -10327,7 +10327,8 @@
       <key>Value</key>
       <integer>1</integer>
     </map>
-    <key>RenderReflectionDetail</key>
+  
+  <key>RenderReflectionDetail</key>
     <map>
       <key>Comment</key>
       <string>DEPRECATED -- use RenderTransparentWater and RenderReflectionProbeDetail -- Detail of reflection render pass.</string>
@@ -10349,6 +10350,17 @@
       <key>Value</key>
       <integer>2</integer>
     </map>
+  <key>RenderReflectionsEnabled</key>
+  <map>
+    <key>Comment</key>
+    <string>Enable/disable reflection probes</string>
+    <key>Persist</key>
+    <integer>1</integer>
+    <key>Type</key>
+    <string>Boolean</string>
+    <key>Value</key>
+    <integer>1</integer>
+  </map>
   <key>RenderReflectionProbeDetail</key>
   <map>
     <key>Comment</key>
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl
deleted file mode 100644
index bbdc8fdd1c..0000000000
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaNoColorV.glsl
+++ /dev/null
@@ -1,112 +0,0 @@
-/** 
- * @file avatarAlphaNoColorV.glsl
- *
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
- * Second Life Viewer Source Code
- * Copyright (C) 2007, 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
- * $/LicenseInfo$
- */
-
-uniform mat4 projection_matrix;
-
-ATTRIBUTE vec3 position;
-ATTRIBUTE vec3 normal;
-ATTRIBUTE vec2 texcoord0;
-
-mat4 getSkinnedTransform();
-void calcAtmospherics(vec3 inPositionEye);
-
-float calcDirectionalLight(vec3 n, vec3 l);
-
-vec3 atmosAmbient();
-vec3 atmosAffectDirectionalLight(float lightIntensity);
-
-VARYING vec3 vary_position;
-VARYING vec3 vary_ambient;
-VARYING vec3 vary_directional;
-VARYING vec3 vary_fragcoord;
-VARYING vec3 vary_pointlight_col;
-VARYING vec2 vary_texcoord0;
-VARYING vec3 vary_norm;
-
-
-uniform float near_clip;
-
-uniform vec4 color;
-
-uniform vec4 light_position[8];
-uniform vec3 light_direction[8];
-uniform vec3 light_attenuation[8]; 
-uniform vec3 light_diffuse[8];
-
-float calcPointLightOrSpotLight(vec3 v, vec3 n, vec4 lp, vec3 ln, float la, float fa, float is_pointlight);
-
-void main()
-{
-	vary_texcoord0 = texcoord0;
-				
-	vec4 pos;
-	vec3 norm;
-	
-	mat4 trans = getSkinnedTransform();
-	vec4 pos_in = vec4(position.xyz, 1.0);
-	pos.x = dot(trans[0], pos_in);
-	pos.y = dot(trans[1], pos_in);
-	pos.z = dot(trans[2], pos_in);
-	pos.w = 1.0;
-	
-	norm.x = dot(trans[0].xyz, normal);
-	norm.y = dot(trans[1].xyz, normal);
-	norm.z = dot(trans[2].xyz, normal);
-	norm = normalize(norm);
-	vary_norm = norm;
-		
-	vec4 frag_pos = projection_matrix * pos;
-	gl_Position = frag_pos;
-	
-	vary_position = pos.xyz;
-	
-	calcAtmospherics(pos.xyz);
-
-	vec4 col = vec4(0.0, 0.0, 0.0, 1.0);
-
-	// Collect normal lights
-	col.rgb += light_diffuse[2].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[2], light_direction[2], light_attenuation[2].x, light_attenuation[2].y, light_attenuation[2].z);
-	col.rgb += light_diffuse[3].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[3], light_direction[3], light_attenuation[3].x, light_attenuation[3].y, light_attenuation[3].z);
-	col.rgb += light_diffuse[4].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[4], light_direction[4], light_attenuation[4].x, light_attenuation[4].y, light_attenuation[4].z);
-	col.rgb += light_diffuse[5].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[5], light_direction[5], light_attenuation[5].x, light_attenuation[5].y, light_attenuation[5].z);
-	col.rgb += light_diffuse[6].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[6], light_direction[6], light_attenuation[6].x, light_attenuation[6].y, light_attenuation[6].z);
-	col.rgb += light_diffuse[7].rgb*calcPointLightOrSpotLight(pos.xyz, norm, light_position[7], light_direction[7], light_attenuation[7].x, light_attenuation[7].y, light_attenuation[7].z);
-	
-	vary_pointlight_col = col.rgb*color.rgb;
-
-	col.rgb = vec3(0,0,0);
-
-	// Add windlight lights
-	col.rgb = atmosAmbient();
-	
-	vary_ambient = col.rgb*color.rgb;
-	vary_directional = color.rgb*atmosAffectDirectionalLight(max(calcDirectionalLight(norm, light_position[0].xyz), 0.0));
-	
-	col.rgb = col.rgb * color.rgb;
-	
-	vary_fragcoord.xyz = frag_pos.xyz + vec3(0,0,near_clip);
-}
-
-
diff --git a/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
index 788ce4a47b..b45dfcd550 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cloudsF.glsl
@@ -126,6 +126,6 @@ void main()
     frag_data[1] = vec4(0.0,0.0,0.0,0.0);
     frag_data[2] = vec4(0,0,0,GBUFFER_FLAG_SKIP_ATMOS);
 
-    gl_FragDepth = 0.99995f;
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH; // SL-14113 Stars and Clouds need same depth
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index 33b97aefcb..73e5b401c0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -54,35 +54,44 @@ vec3 fullbrightScaleSoftClip(vec3 light);
 uniform float minimum_alpha;
 #endif
 
+#ifdef IS_ALPHA
+void waterClip(vec3 pos);
+#endif
+
 void main() 
 {
+
+#ifdef IS_ALPHA
+    waterClip(vary_position.xyz);
+#endif
+
 #ifdef HAS_DIFFUSE_LOOKUP
-	vec4 color = diffuseLookup(vary_texcoord0.xy);
+    vec4 color = diffuseLookup(vary_texcoord0.xy);
 #else
-	vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
+    vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
 #endif
 
-	float final_alpha = color.a * vertex_color.a;
+    float final_alpha = color.a * vertex_color.a;
 
 #ifdef HAS_ALPHA_MASK
-	if (color.a < minimum_alpha)
-	{
-		discard;
-	}
+    if (color.a < minimum_alpha)
+    {
+        discard;
+    }
 #endif
 
-	color.rgb *= vertex_color.rgb;
+    color.rgb *= vertex_color.rgb;
 
 #ifdef WATER_FOG
-	vec3 pos = vary_position;
-	vec4 fogged = applyWaterFogView(pos, vec4(color.rgb, final_alpha));
-	color.rgb = fogged.rgb;
-	color.a   = fogged.a;
+    vec3 pos = vary_position;
+    vec4 fogged = applyWaterFogView(pos, vec4(color.rgb, final_alpha));
+    color.rgb = fogged.rgb;
+    color.a   = fogged.a;
 #else
     color.a   = final_alpha;
 #endif
 
-	frag_color.rgb = srgb_to_linear(color.rgb);
-	frag_color.a   = color.a;
+    frag_color.rgb = srgb_to_linear(color.rgb);
+    frag_color.a   = color.a;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl
index e71636f2c9..e565722164 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightV.glsl
@@ -38,9 +38,7 @@ void calcAtmospherics(vec3 inPositionEye);
 vec3 atmosAmbient();
 vec3 atmosAffectDirectionalLight(float lightIntensity);
 
-#ifdef WATER_FOG
 VARYING vec3 vary_position;
-#endif
 
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
@@ -66,9 +64,7 @@ void main()
 	gl_Position = modelview_projection_matrix*vec4(position.xyz, 1.0);
 #endif
 
-#ifdef WATER_FOG
 	vary_position = pos.xyz;
-#endif
 
 	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
 	
diff --git a/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl b/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
index b4044353b4..7032c45603 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/moonF.glsl
@@ -54,6 +54,12 @@ void main()
         fade = clamp( moon_dir.z*moon_dir.z*4.0, 0.0, 1.0 );
 
     vec4 c      = texture2D(diffuseMap, vary_texcoord0.xy);
+
+    // SL-14113 Don't write to depth; prevent moon's quad from hiding stars which should be visible
+    // Moon texture has transparent pixels <0x55,0x55,0x55,0x00>
+    if (c.a <= 2./255.) // 0.00784
+        discard;
+
 //       c.rgb  = srgb_to_linear(c.rgb);
          c.rgb *= moonlight_color.rgb;
          c.rgb *= moon_brightness;
@@ -67,6 +73,6 @@ void main()
     frag_data[1] = vec4(0.0);
     frag_data[2] = vec4(0.0, 0.0, 0.0, GBUFFER_FLAG_HAS_ATMOS);
 
-    gl_FragDepth = 0.999985f;
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH; // SL-14113
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl b/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
index ef9cee3fa0..6376527273 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/starsF.glsl
@@ -46,8 +46,13 @@ float twinkle(){
     return abs(d);
 }
 
+// See:
+// ALM off: class1/environment/starsF.glsl
+// ALM on : class1/deferred/starsF.glsl
 void main() 
 {
+	// camera above water: class1\deferred\starsF.glsl
+	// camera below water: class1\environment\starsF.glsl
     vec4 col_a = texture2D(diffuseMap, vary_texcoord0.xy);
     vec4 col_b = texture2D(diffuseMap, vary_texcoord0.xy);
     vec4 col = mix(col_b, col_a, blend_factor);
@@ -62,6 +67,6 @@ void main()
     frag_data[1] = vec4(0.0f);
     frag_data[2] = vec4(0.0, 1.0, 0.0, GBUFFER_FLAG_SKIP_ATMOS);
 
-    gl_FragDepth = 0.99995f;
+    gl_FragDepth = LL_SHADER_CONST_STAR_DEPTH; // SL-14113 Moon Haze -- Stars need to depth test behind the moon
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl b/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl
index 8863869e44..38276859a0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/waterV.glsl
@@ -70,7 +70,7 @@ void main()
 	d *= d;
 		
 	oPosition = vec4(position, 1.0);
-	oPosition.z = mix(oPosition.z, max(eyeVec.z*0.75, 0.0), d);
+//	oPosition.z = mix(oPosition.z, max(eyeVec.z*0.75, 0.0), d); // SL-11589 remove "U" shaped horizon
 	vary_position = modelview_matrix * oPosition;
 	oPosition = modelViewProj * oPosition;
 	
diff --git a/indra/newview/app_settings/shaders/class1/environment/moonF.glsl b/indra/newview/app_settings/shaders/class1/environment/moonF.glsl
new file mode 100644
index 0000000000..a220971f06
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/environment/moonF.glsl
@@ -0,0 +1,51 @@
+/** 
+ * @file class1/environment/moonF.glsl
+ *
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2021, 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
+ * $/LicenseInfo$
+ */
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform sampler2D tex0;
+
+VARYING vec2 vary_texcoord0;
+
+// See:
+// AS  off: class1/environment/moonF.glsl
+// ALM off: class1/windlight/moonF.glsl
+// ALM on : class1/deferred/moonF.glsl
+void main() 
+{
+    vec4 color = texture2D(tex0, vary_texcoord0.xy);
+
+    // SL-14113 Don't write to depth; prevent moon's quad from hiding stars which should be visible
+    // Moon texture has transparent pixels <0x55,0x55,0x55,0x00>
+    if (color.a <= 2./255.) // 0.00784
+        discard;
+
+    frag_color = color;
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH; // SL-14113 Moon is infront of stars
+}
diff --git a/indra/newview/app_settings/shaders/class1/objects/indexedTextureF.glsl b/indra/newview/app_settings/shaders/class1/environment/moonV.glsl
index 254c1d4fc2..c00f202c23 100644
--- a/indra/newview/app_settings/shaders/class1/objects/indexedTextureF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/moonV.glsl
@@ -1,9 +1,9 @@
 /** 
- * @file fullbrightF.glsl
+ * @file class1\environment\moonV.glsl
  *
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2007, Linden Research, Inc.
+ * Copyright (C) 2021, 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
@@ -22,12 +22,17 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
- 
 
+uniform mat4 modelview_projection_matrix;
 
-void main() 
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec2 texcoord0;
+
+VARYING vec2 vary_texcoord0;
+
+void main()
 {
-	fullbright_lighting();
+	gl_Position = modelview_projection_matrix * vec4(position, 1);
+	vary_texcoord0 = texcoord0;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl b/indra/newview/app_settings/shaders/class1/environment/starsF.glsl
index 44f2a73e1f..e1a9cc6387 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/starsF.glsl
@@ -1,9 +1,9 @@
 /** 
- * @file shadowAlphaMaskF.glsl
+ * @file class1/environment/starsF.glsl
  *
- * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2011, Linden Research, Inc.
+ * Copyright (C) 2021, 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
@@ -23,8 +23,6 @@
  * $/LicenseInfo$
  */
 
-/*[EXTRA_CODE_HERE]*/
-
 #ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
 #else
@@ -33,23 +31,21 @@ out vec4 frag_color;
 
 uniform sampler2D diffuseMap;
 
-#if !defined(DEPTH_CLAMP)
-VARYING float pos_zd2;
-#endif
-
-VARYING float pos_w;
+uniform float custom_alpha;
 
-VARYING float target_pos_x;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
+// See:
+// ALM off: class1/environment/starsF.glsl
+// ALM on : class1/deferred/starsF.glsl
 void main() 
 {
-	float alpha = diffuseLookup(vary_texcoord0.xy).a * vertex_color.a;
+    vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
+    color.rgb = pow(color.rgb, vec3(0.45));
+    color.rgb *= vertex_color.rgb;
+    color.a *= max(custom_alpha, vertex_color.a);
 
-	frag_color = vec4(alpha, alpha, alpha, 1);
-	
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(pos_zd2/pos_w+0.5, 0.0);
-#endif
+    frag_color = color;
+    gl_FragDepth = LL_SHADER_CONST_STAR_DEPTH; // SL-14113 Moon Haze -- Stars need to depth test behind the moon
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl b/indra/newview/app_settings/shaders/class1/environment/starsV.glsl
index f45c343066..6fcfec6b6a 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/starsV.glsl
@@ -1,9 +1,9 @@
 /** 
- * @file shadowAlphaMaskV.glsl
+ * @file class1/environment/starsV.glsl
  *
- * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * $LicenseInfo:firstyear=2021&license=viewerlgpl$
  * Second Life Viewer Source Code
- * Copyright (C) 2011, Linden Research, Inc.
+ * Copyright (C) 2021, 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
@@ -23,45 +23,19 @@
  * $/LicenseInfo$
  */
 
-uniform mat4 texture_matrix0;
 uniform mat4 modelview_projection_matrix;
-uniform float shadow_target_width;
 
 ATTRIBUTE vec3 position;
 ATTRIBUTE vec4 diffuse_color;
 ATTRIBUTE vec2 texcoord0;
 
-#if !defined(DEPTH_CLAMP)
-VARYING float pos_zd2;
-#endif
-
-VARYING float pos_w;
-
-VARYING float target_pos_x;
 VARYING vec4 vertex_color;
 VARYING vec2 vary_texcoord0;
 
-void passTextureIndex();
-
 void main()
 {
-	//transform vertex
-	vec4 pre_pos = vec4(position.xyz, 1.0);
-	vec4 pos = modelview_projection_matrix * pre_pos;
-	target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
-
-	pos_w = pos.w;
-
-#if !defined(DEPTH_CLAMP)
-	pos_zd2 = pos.z * 0.5;
-	
-	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
-#else
-	gl_Position = pos;
-#endif
-	
-	passTextureIndex();
-
-	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
+	vary_texcoord0 = texcoord0;
 	vertex_color = diffuse_color;
 }
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterV.glsl b/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
index a0a0e7dfca..ac400aa2a6 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
@@ -80,7 +80,7 @@ void main()
 	d *= d;
 		
 	oPosition = vec4(position, 1.0);
-	oPosition.z = mix(oPosition.z, max(eyeVec.z*0.75, 0.0), d);
+//	oPosition.z = mix(oPosition.z, max(eyeVec.z*0.75, 0.0), d); // SL-11589 remove "U" shaped horizon
 
 	oPosition = modelViewProj * oPosition;
 	
diff --git a/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl b/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
index f03003f5e1..c4ab0c95dc 100644
--- a/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
+++ b/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
@@ -51,6 +51,12 @@ void main()
         fade = clamp( moon_dir.z*moon_dir.z*4.0, 0.0, 1.0 );
 
     vec4 c     = texture2D(diffuseMap, vary_texcoord0.xy);
+
+    // SL-14113 Don't write to depth; prevent moon's quad from hiding stars which should be visible
+    // Moon texture has transparent pixels <0x55,0x55,0x55,0x00>
+    if (c.a <= 2./255.) // 0.00784
+        discard;
+
 //       c.rgb = pow(c.rgb, vec3(0.7f)); // can't use "srgb_to_linear(color.rgb)" as that is a deferred only function
          c.rgb *= moonlight_color.rgb;
          c.rgb *= moon_brightness;
@@ -61,5 +67,6 @@ void main()
          c.rgb  = scaleSoftClip(c.rgb);
 
     frag_color = vec4(c.rgb, c.a);
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH; // SL-14113
 }
 
diff --git a/indra/newview/app_settings/shaders/class2/windlight/cloudsF.glsl b/indra/newview/app_settings/shaders/class2/windlight/cloudsF.glsl
index 9c5a4903d0..6f4bdbde28 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/cloudsF.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/cloudsF.glsl
@@ -127,5 +127,11 @@ void main()
 
     /// Gamma correct for WL (soft clip effect).
     frag_color = vec4(color.rgb, alpha1);
+
+    // SL-14113 Moon Haze -- When the camera is underwater fix clouds clipping into moon
+    // camera above water: class1\deferred\cloudsF.glsl
+    // camera below water: class2\windlight\coudsV.glsl
+    // See: starsV.glsl, cloudsV.glsl, moonF.glsl
+    gl_FragDepth = LL_SHADER_CONST_CLOUD_MOON_DEPTH;
 }