SL-19538 Remove hacky ambiance scale and take the mittens off probe a… (#151)

* SL-19538 Remove hacky ambiance scale and take the mittens off probe ambiance values.  Fix for sky brightening being done in sRGB space.

21 files changed, 26 insertions, 93 deletions

diff --git a/indra/llprimitive/llprimitive.cpp b/indra/llprimitive/llprimitive.cpp
index 8b470d235c..5dfce4ae16 100644
--- a/indra/llprimitive/llprimitive.cpp
+++ b/indra/llprimitive/llprimitive.cpp
@@ -83,7 +83,7 @@ const F32 LIGHT_MAX_CUTOFF = 180.f;
 
 // reflection probes
 const F32 REFLECTION_PROBE_MIN_AMBIANCE = 0.f;
-const F32 REFLECTION_PROBE_MAX_AMBIANCE = 1.f;
+const F32 REFLECTION_PROBE_MAX_AMBIANCE = 100.f;
 const F32 REFLECTION_PROBE_DEFAULT_AMBIANCE = 0.f;
 const F32 REFLECTION_PROBE_MIN_CLIP_DISTANCE = 0.f;
 const F32 REFLECTION_PROBE_MAX_CLIP_DISTANCE = 1024.f;
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index 016cbe6e75..e1679c7f52 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -276,7 +276,7 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 		}
 	}
 
-	if (features->hasAtmospherics || features->isDeferred)
+	if (features->hasAtmospherics || features->isDeferred || features->hasTransport)
     {
         if (!shader->attachFragmentObject("windlight/atmosphericsFuncs.glsl")) {
             return FALSE;
diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 5ffd610fba..4490e3eec2 100644
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -10347,17 +10347,6 @@
     <key>Value</key>
     <integer>128</integer>
   </map>
-  <key>RenderReflectionProbeAmbianceScale</key>
-  <map>
-    <key>Comment</key>
-    <string>Scaler to apply to reflection probes to over-brighten sky contributions to indirect light</string>
-    <key>Persist</key>
-    <integer>1</integer>
-    <key>Type</key>
-    <string>F32</string>
-    <key>Value</key>
-    <real>8</real>
-  </map>
   <key>RenderTonemapper</key>
   <map>
     <key>Comment</key>
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index 3a15fd1111..03df9fd4a1 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -44,7 +44,6 @@ vec4 applyWaterFogView(vec3 pos, vec4 color);
 vec3 srgb_to_linear(vec3 cs);
 vec3 linear_to_srgb(vec3 cl);
 vec3 fullbrightAtmosTransport(vec3 light);
-vec3 fullbrightScaleSoftClip(vec3 light);
 
 #ifdef HAS_ALPHA_MASK
 uniform float minimum_alpha;
@@ -88,8 +87,9 @@ void main()
 #endif
 
 #ifndef IS_HUD
-    color.rgb = fullbrightAtmosTransport(color.rgb);
     color.rgb = srgb_to_linear(color.rgb);
+    color.rgb = fullbrightAtmosTransport(color.rgb);
+    
 #endif
 
     frag_color.rgb = color.rgb;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
index 0090155e5c..62d134188c 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/skyV.glsl
@@ -91,7 +91,7 @@ void main()
     vary_LightNormPosDot = rel_pos_lightnorm_dot;
 
     // Initialize temp variables
-    vec3 sunlight = (sun_up_factor == 1) ? sunlight_color*2.0 : moonlight_color;
+    vec3 sunlight = (sun_up_factor == 1) ? sunlight_color : moonlight_color;
     
     // Sunlight attenuation effect (hue and brightness) due to atmosphere
     // this is used later for sunlight modulation at various altitudes
diff --git a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
index e7322c14fb..70be9a9029 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
@@ -276,9 +276,7 @@ void main()
 
     color.rgb *= diffuse_linear.rgb;
 
-    color.rgb = linear_to_srgb(color.rgb);
     color.rgb = atmosFragLightingLinear(color.rgb, additive, atten);
-    color.rgb = srgb_to_linear(color.rgb);
 
     vec4 light = vec4(0,0,0,0);
     
diff --git a/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl b/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl
index fb76db99a0..b76443f0f0 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/pbralphaF.glsl
@@ -83,7 +83,6 @@ vec3 linear_to_srgb(vec3 c);
 
 void calcAtmosphericVarsLinear(vec3 inPositionEye, vec3 norm, vec3 light_dir, out vec3 sunlit, out vec3 amblit, out vec3 atten, out vec3 additive);
 vec3 atmosFragLightingLinear(vec3 color, vec3 additive, vec3 atten);
-vec3 scaleSoftClipFragLinear(vec3 color);
 
 void calcHalfVectors(vec3 lv, vec3 n, vec3 v, out vec3 h, out vec3 l, out float nh, out float nl, out float nv, out float vh, out float lightDist);
 float calcLegacyDistanceAttenuation(float distance, float falloff);
@@ -236,11 +235,8 @@ void main()
     color = pbrBaseLight(diffuseColor, specularColor, metallic, v, norm.xyz, perceptualRoughness, light_dir, sunlit_linear, scol, radiance, irradiance, colorEmissive, ao, additive, atten, spec);
     glare += max(max(spec.r, spec.g), spec.b);
 
-    color.rgb = linear_to_srgb(color.rgb);
     color.rgb = atmosFragLightingLinear(color.rgb, additive, atten);
-    color.rgb = scaleSoftClipFragLinear(color.rgb);
-    color.rgb = srgb_to_linear(color.rgb);
-
+    
     vec3 light = vec3(0);
 
     // Punctual lights
diff --git a/indra/newview/app_settings/shaders/class2/interface/irradianceGenF.glsl b/indra/newview/app_settings/shaders/class2/interface/irradianceGenF.glsl
index baf68e11f4..d21af946e0 100644
--- a/indra/newview/app_settings/shaders/class2/interface/irradianceGenF.glsl
+++ b/indra/newview/app_settings/shaders/class2/interface/irradianceGenF.glsl
@@ -32,7 +32,6 @@ uniform samplerCubeArray   reflectionProbes;
 uniform int sourceIdx;
 
 uniform float max_probe_lod;
-uniform float ambiance_scale;
 
 in vec3 vary_dir;
 
@@ -200,8 +199,6 @@ vec4 filterColor(vec3 N)
 
     color /= float(u_sampleCount);
 
-    color.rgb *= ambiance_scale;
-
     return color;
 }
 
diff --git a/indra/newview/app_settings/shaders/class2/windlight/atmosphericsF.glsl b/indra/newview/app_settings/shaders/class2/windlight/atmosphericsF.glsl
index 1d02498209..22e93496d2 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/atmosphericsF.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/atmosphericsF.glsl
@@ -30,10 +30,14 @@ vec3 scaleSoftClipFrag(vec3 light);
 vec3 srgb_to_linear(vec3 col);
 vec3 linear_to_srgb(vec3 col);
 
+uniform int sun_up_factor;
+
 vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten)
 { 
     light *= atten.r;
-    light += additive * 2.0;
+    additive = srgb_to_linear(additive*2.0);
+    additive *= sun_up_factor + 1.0;
+    light += additive;
     return light;
 }
 
diff --git a/indra/newview/app_settings/shaders/class2/windlight/atmosphericsFuncs.glsl b/indra/newview/app_settings/shaders/class2/windlight/atmosphericsFuncs.glsl
index c2527db218..12a99edc34 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/atmosphericsFuncs.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/atmosphericsFuncs.glsl
@@ -63,9 +63,7 @@ void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, ou
     vec3  rel_pos_norm = normalize(rel_pos);
     float rel_pos_len  = length(rel_pos);
     
-    float scale = sun_up_factor + 1;
     vec3  sunlight     = (sun_up_factor == 1) ? sunlight_color: moonlight_color;
-    sunlight *= scale;
 
     // sunlight attenuation effect (hue and brightness) due to atmosphere
     // this is used later for sunlight modulation at various altitudes
@@ -143,7 +141,7 @@ void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, ou
     
     // fudge sunlit and amblit to get consistent lighting compared to legacy
     // midday before PBR was a thing
-    sunlit = sunlight.rgb / scale;
+    sunlit = sunlight.rgb;
     amblit = tmpAmbient.rgb * 0.25;
 
     additive *= vec3(1.0 - combined_haze);
diff --git a/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl b/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl
index 6aa719d200..8221ba9516 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/transportF.glsl
@@ -30,14 +30,13 @@
 vec3 getAdditiveColor();
 vec3 getAtmosAttenuation();
 
-vec3 srgb_to_linear(vec3 col);
-vec3 linear_to_srgb(vec3 col);
+vec3 atmosFragLighting(vec3 light, vec3 additive, vec3 atten);
+
+// the below implementations are deprecated but remain here as adapters for shaders that haven't been refactored yet
 
 vec3 atmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
 {
-    light *= atten.r;
-	light += additive * 2.0;
-	return light;
+    return atmosFragLighting(light, additive, atten);
 }
 
 vec3 atmosTransport(vec3 light)
@@ -45,30 +44,17 @@ vec3 atmosTransport(vec3 light)
      return atmosTransportFrag(light, getAdditiveColor(), getAtmosAttenuation());
 }
 
-vec3 fullbrightAtmosTransportFragLinear(vec3 light, vec3 additive, vec3 atten)
-{
-    // same as non-linear version, probably fine
-    //float brightness = dot(light.rgb * 0.5, vec3(0.3333)) + 0.1;    
-    //return mix(atmosTransportFrag(light.rgb, additive, atten), light.rgb + additive, brightness * brightness);
-    return atmosTransportFrag(light, additive, atten);
-}
-
 vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten)
 {
-    //float brightness = dot(light.rgb * 0.5, vec3(0.3333)) + 0.1;    
-    //return mix(atmosTransportFrag(light.rgb, additive, atten), light.rgb + additive, brightness * brightness);
     return atmosTransportFrag(light, additive, atten);
 }
 
 vec3 fullbrightAtmosTransport(vec3 light)
 {
-    //return fullbrightAtmosTransportFrag(light, getAdditiveColor(), getAtmosAttenuation());
     return atmosTransport(light);
 }
 
 vec3 fullbrightShinyAtmosTransport(vec3 light)
 {
-    //float brightness = dot(light.rgb, vec3(0.33333));
-    //return mix(atmosTransport(light.rgb), (light.rgb + getAdditiveColor().rgb) * (2.0 - brightness), brightness * brightness);
     return atmosTransport(light);
 }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl b/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl
index b90de7609b..f6bed16c84 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/fullbrightShinyF.glsl
@@ -43,9 +43,7 @@ VARYING vec3 vary_position;
 
 uniform samplerCube environmentMap;
 
-vec3 fullbrightShinyAtmosTransport(vec3 light);
 vec3 fullbrightAtmosTransportFrag(vec3 light, vec3 additive, vec3 atten);
-vec3 fullbrightScaleSoftClip(vec3 light);
 
 void calcAtmosphericVars(vec3 inPositionEye, vec3 light_dir, float ambFactor, out vec3 sunlit, out vec3 amblit, out vec3 additive, out vec3 atten, bool use_ao);
 
@@ -88,9 +86,8 @@ void main()
     sampleReflectionProbesLegacy(ambenv, glossenv, legacyenv, vec2(0), pos.xyz, norm.xyz, spec.a, env_intensity);
     applyLegacyEnv(color.rgb, legacyenv, spec, pos, norm, env_intensity);
 
-    color.rgb = fullbrightAtmosTransportFrag(color.rgb, additive, atten);
-    color.rgb = fullbrightScaleSoftClip(color.rgb);
     color.rgb = srgb_to_linear(color.rgb);
+    color.rgb = fullbrightAtmosTransportFrag(color.rgb, additive, atten);
 #endif
 
 	color.a = 1.0;
diff --git a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
index 6e41df34a4..02ab4494f6 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/materialF.glsl
@@ -44,7 +44,6 @@ vec4 applyWaterFogView(vec3 pos, vec4 color);
 vec3 atmosFragLightingLinear(vec3 l, vec3 additive, vec3 atten);
 vec3 scaleSoftClipFragLinear(vec3 l);
 void calcAtmosphericVarsLinear(vec3 inPositionEye, vec3 norm, vec3 light_dir, out vec3 sunlit, out vec3 amblit, out vec3 atten, out vec3 additive);
-vec3 fullbrightAtmosTransportFragLinear(vec3 light, vec3 additive, vec3 atten);
 
 vec3 srgb_to_linear(vec3 cs);
 vec3 linear_to_srgb(vec3 cs);
@@ -386,10 +385,7 @@ void main()
         glare += cur_glare;
     }
 
-    color.rgb = linear_to_srgb(color.rgb);
     color.rgb = atmosFragLightingLinear(color.rgb, additive, atten); 
-    color.rgb = scaleSoftClipFragLinear(color.rgb);
-    color.rgb = srgb_to_linear(color.rgb);
 
     vec3 npos = normalize(-pos.xyz);
     vec3 light = vec3(0, 0, 0);
diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
index 0e3ebd1534..7953360054 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -71,7 +71,6 @@ vec4 getPositionWithDepth(vec2 pos_screen, float depth);
 void calcAtmosphericVarsLinear(vec3 inPositionEye, vec3 norm, vec3 light_dir, out vec3 sunlit, out vec3 amblit, out vec3 atten, out vec3 additive);
 vec3  atmosFragLightingLinear(vec3 l, vec3 additive, vec3 atten);
 vec3  scaleSoftClipFragLinear(vec3 l);
-vec3  fullbrightAtmosTransportFragLinear(vec3 light, vec3 additive, vec3 atten);
 
 // reflection probe interface
 void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv,
@@ -212,6 +211,7 @@ void main()
     {
         //should only be true of WL sky, just port over base color value
         color = srgb_to_linear(texture2D(emissiveRect, tc).rgb);
+        color *= sun_up_factor + 1.0;
     }
     else
     {
@@ -262,9 +262,7 @@ void main()
         
         if (do_atmospherics)
         {
-            color = linear_to_srgb(color);
             color = atmosFragLightingLinear(color, additive, atten);
-            color = srgb_to_linear(color);
         }
    }
 
diff --git a/indra/newview/app_settings/shaders/class3/environment/waterF.glsl b/indra/newview/app_settings/shaders/class3/environment/waterF.glsl
index 9da86759c9..ec0439fa97 100644
--- a/indra/newview/app_settings/shaders/class3/environment/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class3/environment/waterF.glsl
@@ -282,11 +282,7 @@ void main()
 
     color = mix(color, fb.rgb, f);
 
-    color.rgb = linear_to_srgb(color.rgb);
     color = atmosFragLightingLinear(color, additive, atten);
-    color = scaleSoftClipFragLinear(color);
-    color.rgb = srgb_to_linear(color.rgb);
-
 
     float spec = min(max(max(punctual.r, punctual.g), punctual.b), 0.05);
     
diff --git a/indra/newview/llreflectionmapmanager.cpp b/indra/newview/llreflectionmapmanager.cpp
index 09ac7e57a4..bccd76415f 100644
--- a/indra/newview/llreflectionmapmanager.cpp
+++ b/indra/newview/llreflectionmapmanager.cpp
@@ -651,10 +651,6 @@ void LLReflectionMapManager::updateProbeFace(LLReflectionMap* probe, U32 face)
             S32 channel = gIrradianceGenProgram.enableTexture(LLShaderMgr::REFLECTION_PROBES, LLTexUnit::TT_CUBE_MAP_ARRAY);
             mTexture->bind(channel);
 
-            static LLCachedControl<F32> ambiance_scale(gSavedSettings, "RenderReflectionProbeAmbianceScale", 8.f);
-            static LLStaticHashedString ambiance_scale_str("ambiance_scale");
-
-            gIrradianceGenProgram.uniform1f(ambiance_scale_str, ambiance_scale);
             gIrradianceGenProgram.uniform1i(sSourceIdx, sourceIdx);
             gIrradianceGenProgram.uniform1f(LLShaderMgr::REFLECTION_PROBE_MAX_LOD, mMaxProbeLOD);
             
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index b50cb49b7e..8b402e210d 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -1920,7 +1920,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredFullbrightProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightProgram.mFeatures.hasTransport = true;
-		gDeferredFullbrightProgram.mFeatures.hasSrgb = true;		
+		gDeferredFullbrightProgram.mFeatures.hasSrgb = true;
 		gDeferredFullbrightProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightProgram.mShaderFiles.clear();
 		gDeferredFullbrightProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER));
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index dfe365b737..11deff5bff 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -5637,15 +5637,6 @@ void LLPipeline::setupHWLights()
     // Ambient
     LLColor4 ambient = psky->getTotalAmbient();
 
-    static LLCachedControl<F32> ambiance_scale(gSavedSettings, "RenderReflectionProbeAmbianceScale", 8.f);
-
-    F32 light_scale = 1.f;
-
-    if (gCubeSnapshot && !mReflectionMapManager.isRadiancePass())
-    { //darken local lights based on brightening of sky lighting
-        light_scale = 1.f / ambiance_scale;
-    }
-
 	gGL.setAmbientLightColor(ambient);
 
     bool sun_up  = environment.getIsSunUp();
@@ -5739,7 +5730,7 @@ void LLPipeline::setupHWLights()
 			}
 			
             //send linear light color to shader
-			LLColor4  light_color = light->getLightLinearColor()*light_scale;
+			LLColor4  light_color = light->getLightLinearColor();
 			light_color.mV[3] = 0.0f;
 
 			F32 fade = iter->fade;
@@ -7885,15 +7876,6 @@ void LLPipeline::renderDeferredLighting()
 
     llassert(!sRenderingHUDs);
 
-    static LLCachedControl<F32> ambiance_scale(gSavedSettings, "RenderReflectionProbeAmbianceScale", 8.f);
-
-    F32 light_scale = 1.f;
-
-    if (gCubeSnapshot && !mReflectionMapManager.isRadiancePass())
-    { //darken local lights based on brightening of sky lighting
-        light_scale = 1.f / ambiance_scale;
-    }
-
     LLRenderTarget *screen_target         = &mRT->screen;
     LLRenderTarget* deferred_light_target = &mRT->deferredLight;
 
@@ -8129,7 +8111,7 @@ void LLPipeline::renderDeferredLighting()
                     F32        s = volume->getLightRadius() * 1.5f;
 
                     // send light color to shader in linear space
-                    LLColor3 col = volume->getLightLinearColor()*light_scale;
+                    LLColor3 col = volume->getLightLinearColor();
 
                     if (col.magVecSquared() < 0.001f)
                     {
@@ -8223,7 +8205,7 @@ void LLPipeline::renderDeferredLighting()
                     setupSpotLight(gDeferredSpotLightProgram, drawablep);
 
                     // send light color to shader in linear space
-                    LLColor3 col = volume->getLightLinearColor() * light_scale;
+                    LLColor3 col = volume->getLightLinearColor();
 
                     gDeferredSpotLightProgram.uniform3fv(LLShaderMgr::LIGHT_CENTER, 1, c);
                     gDeferredSpotLightProgram.uniform1f(LLShaderMgr::LIGHT_SIZE, s);
@@ -8298,7 +8280,7 @@ void LLPipeline::renderDeferredLighting()
                     setupSpotLight(gDeferredMultiSpotLightProgram, drawablep);
 
                     // send light color to shader in linear space
-                    LLColor3 col = volume->getLightLinearColor() * light_scale;
+                    LLColor3 col = volume->getLightLinearColor();
 
                     gDeferredMultiSpotLightProgram.uniform3fv(LLShaderMgr::LIGHT_CENTER, 1, tc.v);
                     gDeferredMultiSpotLightProgram.uniform1f(LLShaderMgr::LIGHT_SIZE, light_size_final);
diff --git a/indra/newview/skins/default/xui/en/floater_adjust_environment.xml b/indra/newview/skins/default/xui/en/floater_adjust_environment.xml
index 39fe573c98..f6bfb3574d 100644
--- a/indra/newview/skins/default/xui/en/floater_adjust_environment.xml
+++ b/indra/newview/skins/default/xui/en/floater_adjust_environment.xml
@@ -266,7 +266,7 @@
                           layout="topleft"
                           left_delta="5"
                           min_val="0"
-                          max_val="1"
+                          max_val="10"
                           name="probe_ambiance"
                           top_pad="5"
                           width="185"
diff --git a/indra/newview/skins/default/xui/en/floater_tools.xml b/indra/newview/skins/default/xui/en/floater_tools.xml
index 1faf9c3152..5e999ed245 100644
--- a/indra/newview/skins/default/xui/en/floater_tools.xml
+++ b/indra/newview/skins/default/xui/en/floater_tools.xml
@@ -2574,7 +2574,7 @@ even though the user gets a free copy.
                    label="Ambiance"
                    label_width="55"
                    left="10"
-                   max_val="1"
+                   max_val="100"
                    min_val="0"
                    mouse_opaque="true"
                    name="Probe Ambiance"
diff --git a/indra/newview/skins/default/xui/en/panel_settings_sky_atmos.xml b/indra/newview/skins/default/xui/en/panel_settings_sky_atmos.xml
index 094be36b01..a80b1a9166 100644
--- a/indra/newview/skins/default/xui/en/panel_settings_sky_atmos.xml
+++ b/indra/newview/skins/default/xui/en/panel_settings_sky_atmos.xml
@@ -333,7 +333,7 @@
                           layout="topleft"
                           left_delta="5"
                           min_val="0"
-                          max_val="1"
+                          max_val="10"
                           name="probe_ambiance"
                           top_delta="20"
                           width="219"