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Add improvements to Volumetric Fog quality and performance

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This commit is contained in:
Wojtek Figat
2026-01-27 22:20:48 +01:00
parent d47bd5d6e7
commit f9b784a42a
16 changed files with 249 additions and 191 deletions
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7
Source/Engine/Level/Actors/ExponentialHeightFog.cpp
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@@ -187,8 +187,8 @@ GPU_CB_STRUCT(Data {
void ExponentialHeightFog::DrawFog(GPUContext* context, RenderContext& renderContext, GPUTextureView* output)
{
PROFILE_GPU_CPU("Exponential Height Fog");
auto integratedLightScattering = renderContext.Buffers->VolumetricFog;
bool useVolumetricFog = integratedLightScattering != nullptr;
auto volumetricFogTexture = renderContext.Buffers->VolumetricFog;
bool useVolumetricFog = volumetricFogTexture != nullptr;
// Setup shader inputs
Data data;
@@ -199,9 +199,10 @@ void ExponentialHeightFog::DrawFog(GPUContext* context, RenderContext& renderCon
context->UpdateCB(cb, &data);
context->BindCB(0, cb);
context->BindSR(0, renderContext.Buffers->DepthBuffer);
context->BindSR(1, integratedLightScattering ? integratedLightScattering->ViewVolume() : nullptr);
context->BindSR(1, volumetricFogTexture ? volumetricFogTexture->ViewVolume() : nullptr);
// TODO: instead of rendering fullscreen triangle, draw quad transformed at the fog start distance (also it could use early depth discard)
// TODO: or use DepthBounds to limit the fog rendering to the distance range
// Draw fog
const int32 psIndex = (useVolumetricFog ? 1 : 0);