Color gradingpostprocess

Efficient implementation of custom grading/adding custom post process pass

• Look at deferred decals/deferred decal mesh (PostProcessDeferredDecals.cpp & PostProcessMeshDecals.cpp)

• Look at RenderMeshDecals()

• Look at FDecalRendering::BuildVisibleDecalList

• Also look at possibly following UDecalComponent()

• Derive from USceneComponent instead of UPrimitiveComponent and manually add the color grade sphere to a list on FScene in CrateRenderState_Concurrent()

• FDeferredShadingSceneRenderer::Render()

• GCompositionLighting.ProcessAfterBasePass(RHICmdList, Views[ViewIndex])

• FCompositionLighting::ProcessAfterBasePass()

  • Sets up composition graph for deferred decals and ambient occlusion

  • Deferred decals are done with normal rendering

  • Ambient occlusion can be done with Compute shader. Look at AddPostProcessingAmbientOcclusion() for compute shader version of a postprocess pass

  • Actual rendering/processing happens in FRCPassPostProcessDeferredDecals::Process() or FRCPassPostProcessAmbientOcclusion::Process()