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Optimize Volumetric Fog on 2k/4k displays by limiting res to 1080p

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This commit is contained in:
Wojtek Figat
2026-01-28 08:53:15 +01:00
parent fa428e343b
commit b1b6953200
1 changed files with 14 additions and 2 deletions
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16
Source/Engine/Renderer/VolumetricFogPass.cpp
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@@ -240,15 +240,27 @@ bool VolumetricFogPass::Init(FrameCache& cache, RenderContext& renderContext, GP
cache.MissedHistorySamplesCount = 4;
break;
case Quality::Ultra:
cache.GridPixelSize = 8;
cache.GridPixelSize = 10;
cache.GridSizeZ = 128;
cache.MissedHistorySamplesCount = 8;
break;
}
// Prepare
// Calculate volumetric fog size
const int32 width = renderContext.Buffers->GetWidth();
const int32 height = renderContext.Buffers->GetHeight();
constexpr int32 resolutionLimit = 1920; // Limit resolution to 1080p to save on perf for players on 2k/4k displays (incl. consoles)
if (resolutionLimit > 0)
{
const int32 limitX = resolutionLimit; // Controls screen width limit, height depends on the aspect ratio
const int32 limitY = Math::CeilToInt((float)limitX * (float)height / (float)width);
if (width > limitX || height > limitY)
{
const float scaleX = (float)Math::Max(width, limitX) / limitX;
const float scaleY = (float)Math::Max(height, limitY) / limitY;
cache.GridPixelSize = Math::CeilToInt(cache.GridPixelSize * Math::Max(scaleX, scaleY));
}
}
cache.GridSize = Float3(
(float)Math::DivideAndRoundUp(width, cache.GridPixelSize),
(float)Math::DivideAndRoundUp(height, cache.GridPixelSize),