From 4fd6343fb9b0d3c071dc12a50dc44d80a2dd681e Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Sun, 10 Aug 2025 16:04:24 +0200
Subject: [PATCH] Fix missing memory barrier on particle indirect args building
 to ensure buffer copies are done afetr whole buffer update ends

---
 Source/Engine/Particles/Particles.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Source/Engine/Particles/Particles.cpp b/Source/Engine/Particles/Particles.cpp
index 98fc230c6..46649f82a 100644
--- a/Source/Engine/Particles/Particles.cpp
+++ b/Source/Engine/Particles/Particles.cpp
@@ -813,6 +813,9 @@ void DrawEmittersGPU(RenderContextBatch& renderContextBatch)
         // Upload default arguments
         context->UpdateBuffer(GPUIndirectArgsBuffer, indirectArgsMemory, indirectArgsOffset);
 
+        // Wait for whole buffer write end before submitting buffer copies
+        pass.MemoryBarrier();
+
         // Copy particle counts into draw commands
         indirectArgsOffset = 0;
         for (GPUEmitterDraw& draw : GPUEmitterDraws)