SL-18190 Reduce banding - experiment with RGB16F reflection probes

indra/llrender/llcubemaparray.cpp

@@ -122,7 +122,7 @@ void LLCubeMapArray::allocate(U32 resolution, U32 components, U32 count, BOOL us
 
     bind(0);
 
-    glTexImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, 0, GL_RGB10_A2, resolution, resolution, count*6, 0,
+    glTexImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, 0, GL_RGB16F, resolution, resolution, count*6, 0,
         GL_RGB, GL_UNSIGNED_BYTE, nullptr);
 
     mImage->setAddressMode(LLTexUnit::TAM_CLAMP);

indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl

@@ -63,7 +63,7 @@ void main()
     diff.rgb = linear_to_srgb(diff.rgb);
     vec3 seed = diff.rgb*vec3(vary_fragcoord.xy, vary_fragcoord.x+vary_fragcoord.y)*2048;
     vec3 nz = vec3(noise(seed.r), noise(seed.g), noise(seed.b));
-    diff.rgb += nz*0.008;
+    diff.rgb += nz*0.005;
     frag_color = diff;
 }
 

indra/newview/llreflectionmapmanager.cpp

@@ -80,7 +80,7 @@ void LLReflectionMapManager::update()
 
     if (!mRenderTarget.isComplete())
     {
-        U32 color_fmt = GL_RGB10_A2;
+        U32 color_fmt = GL_RGB16F;
         const bool use_depth_buffer = true;
         const bool use_stencil_buffer = true;
         U32 targetRes = LL_REFLECTION_PROBE_RESOLUTION * 2; // super sample
@@ -95,7 +95,7 @@ void LLReflectionMapManager::update()
         mMipChain.resize(count);
         for (int i = 0; i < count; ++i)
         {
-            mMipChain[i].allocate(res, res, GL_RGB10_A2, false, false, LLTexUnit::TT_RECT_TEXTURE);
+            mMipChain[i].allocate(res, res, GL_RGB16F, false, false, LLTexUnit::TT_RECT_TEXTURE);
             res /= 2;
         }
     }