From a1096aaf92e98bd573a78b586c7b42a6019836c3 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Wed, 11 Feb 2026 13:32:41 +0100
Subject: [PATCH] Fix crash when `MultiScaler` shader is not yet loaded on
 first frame

---
 Source/Engine/Graphics/RenderBuffers.cpp              | 4 ++++
 Source/Engine/Renderer/ScreenSpaceReflectionsPass.cpp | 8 ++++++++
 2 files changed, 12 insertions(+)

diff --git a/Source/Engine/Graphics/RenderBuffers.cpp b/Source/Engine/Graphics/RenderBuffers.cpp
index df79cd50d..8b67a64b3 100644
--- a/Source/Engine/Graphics/RenderBuffers.cpp
+++ b/Source/Engine/Graphics/RenderBuffers.cpp
@@ -84,6 +84,8 @@ GPUTexture* RenderBuffers::RequestHalfResDepth(GPUContext* context)
     const auto currentFrame = Engine::FrameCount;
     if (LastFrameHalfResDepth == currentFrame)
         return HalfResDepth;
+    if (!MultiScaler::Instance()->IsReady())
+        return DepthBuffer;
 
     const int32 halfDepthWidth = RenderTools::GetResolution(_width, ResolutionMode::Half);
     const int32 halfDepthHeight = RenderTools::GetResolution(_height, ResolutionMode::Half);
@@ -119,6 +121,8 @@ GPUTexture* RenderBuffers::RequestHiZ(GPUContext* context, bool fullRes, int32 m
     const auto currentFrame = Engine::FrameCount;
     if (LastFrameHiZ == currentFrame)
         return HiZ;
+    if (!MultiScaler::Instance()->IsReady())
+        return nullptr;
     LastFrameHiZ = currentFrame;
 
     // Allocate or resize buffer (with full mip-chain)
diff --git a/Source/Engine/Renderer/ScreenSpaceReflectionsPass.cpp b/Source/Engine/Renderer/ScreenSpaceReflectionsPass.cpp
index e992b7c5a..38d4e295c 100644
--- a/Source/Engine/Renderer/ScreenSpaceReflectionsPass.cpp
+++ b/Source/Engine/Renderer/ScreenSpaceReflectionsPass.cpp
@@ -262,6 +262,14 @@ GPUTexture* ScreenSpaceReflectionsPass::Render(RenderContext& renderContext, GPU
     GPUTexture* depthBufferTrace = settings.DepthResolution == ResolutionMode::Half ? buffers->RequestHalfResDepth(context) : buffers->DepthBuffer;
     data.DepthMips = 1;
 #endif
+    if (depthBufferTrace == nullptr)
+    {
+        RenderTargetPool::Release(colorBuffer0);
+        RenderTargetPool::Release(colorBuffer1);
+        RenderTargetPool::Release(traceBuffer);
+        RenderTargetPool::Release(resolveBuffer);
+        return nullptr;
+    }
 
     // Prepare constants
     context->UpdateCB(cb, &data);