Improve quality for atlas sampling

Source/Engine/Renderer/GlobalSurfaceAtlasPass.cpp

@@ -242,7 +242,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
     PROFILE_GPU_CPU("Global Surface Atlas");
 
     // TODO: configurable via graphics settings
-    const int32 resolution = 4096;
+    const int32 resolution = 2048;
     const float resolutionInv = 1.0f / resolution;
     // TODO: configurable via postFx settings (maybe use Global SDF distance?)
     const float distance = 20000;
@@ -601,6 +601,7 @@ bool GlobalSurfaceAtlasPass::Render(RenderContext& renderContext, GPUContext* co
     result.Atlas[3] = surfaceAtlasData.AtlasGBuffer2;
     result.Atlas[4] = surfaceAtlasData.AtlasDirectLight;
     result.Objects = surfaceAtlasData.ObjectsBuffer.GetBuffer();
+    result.GlobalSurfaceAtlas.Resolution = (float)resolution;
     result.GlobalSurfaceAtlas.ObjectsCount = surfaceAtlasData.Objects.Count();
     surfaceAtlasData.Result = result;
     return false;

Source/Engine/Renderer/GlobalSurfaceAtlasPass.h

@@ -13,7 +13,8 @@ public:
     // Constant buffer data for Global Surface Atlas access on a GPU.
     PACK_STRUCT(struct GlobalSurfaceAtlasData
         {
-        Vector3 Padding;
+        Vector2 Padding;
+        float Resolution;
         uint32 ObjectsCount;
         });