From 5e894ea45c8afda8c9c39d4ddcb108d284bab7d5 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Fri, 3 Apr 2026 12:46:06 +0200
Subject: [PATCH] Fix Volumetric Fog to reset when not rendered for some time

---
 Source/Engine/Renderer/VolumetricFogPass.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/Engine/Renderer/VolumetricFogPass.cpp b/Source/Engine/Renderer/VolumetricFogPass.cpp
index 1abb35f36..4b2058047 100644
--- a/Source/Engine/Renderer/VolumetricFogPass.cpp
+++ b/Source/Engine/Renderer/VolumetricFogPass.cpp
@@ -269,7 +269,8 @@ bool VolumetricFogPass::Init(FrameCache& cache, RenderContext& renderContext, GP
     fogData.MaxDistance = options.Distance;
     if (renderContext.Task->IsCameraCut ||
         renderContext.View.IsOriginTeleport() ||
-        (renderContext.Buffers->VolumetricFog && renderContext.Buffers->VolumetricFog->Size3() != cache.GridSize))
+        (renderContext.Buffers->VolumetricFog && renderContext.Buffers->VolumetricFog->Size3() != cache.GridSize) ||
+        Engine::FrameCount - renderContext.Buffers->LastFrameVolumetricFog > 4)
     {
         // Don't blend with history on camera cuts or teleport or resizes
         cache.HistoryWeight = 0.0f;