Unreal Engine Issues
Unreal Engine Issues
'Stat Collision' Console Command appears twice in PIE list
Tools - Nov 3, 2016'Stat Collision' Console Command appears twice in PIE list Regression (no) issue (does) occur in 4.12.5 ...
AssetManager does not correctly call delegates if bShouldUseSynchronousLoad is true
UE - Gameplay - Oct 3, 2018There's a bug in UAssetManager::LoadAssetList where the passed in DelegateToCall is not being called in the bShouldUseSynchronousLoad case. This can cause gameplay logic to fail when that bool is tr ...
Assertion failed: ExportSettings == *ExistingExportSettings [File:D:\build\++UE5\Sync\Engine\Source\Editor\UnrealEd\Private\Lightmass\Lightmass.cpp] [Line: 546]
UE - Graphics Features - Sep 12, 2023Generated from CrashReporter Logs can be obtained via Crash Reporter ...
Shadows Appear when Approached and Disappear when Distant on Movable Objects
Docs - Samples - Sep 21, 2016While working on writing test cases for content examples, I discovered that the shadow behind certain objects appear and disappear depending on the distance from the camera. This might be similar ...
Vertex Interpolate Node Doesn't Work with Lightmass
UE - Graphics Features - Lumen - Aug 8, 2018The vertex interpolate node doesn't work with lightmass. Found in 4.19 CL# 4033788, 4.20 CL# 4233996, and 4.21 CL# 4258917 ...
Translucent Materials Receiving Incorrect Shadows in Forward Shading
UE - Graphics Features - Oct 2, 2018Translucent Materials will receive incorrect shadows in forward shading. This is working as expected in 4.18 CL# 3832480 Found in 4.19 CL# 4033788, 4.20 CL# 4369336, 4.21 CL# 4408769, 4.22 CL# 4413 ...
'Force Volumetric' property broken on instanced static meshes
UE - Graphics Features - Jan 11, 2021Regular static meshes work expectedly with Force Volumetric however instanced static meshes do not. ...
Mesh Variation node usage inside macro - lost of material slot name
UE - Anim - Mutable - Nov 14, 2025When using a mesh variation node within a macro instance script, the material slot name of the input mesh is not transferred. On the generated mesh output, the material slot name is "None" ...
Shadows are Heavily Aliased with PCSS Enabled
UE - Graphics Features - Apr 11, 2019Shadows are exetremely rough and aliased if r.shadow.FilterMethod is set to 1. Working as expected in 4.21 CL# 4753647 Found in 4.22 CL# 5660361 and 4.23 CL# 5810496 ...
Vulkan bloom convolution causes crash
UE - Rendering Architecture - RHI - Jul 6, 2021Ensure condition failed: Layout == VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR || Layout == VK_IMAGE_LAYOUT_DEPTH_READ_ONLY_STENCIL_ATTACHMENT_OPTIMAL || Layout == VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_STENCIL_RE ...