Unreal Engine Issues
Unreal Engine Issues
Disabling Shadow Denoiser causes raytraced shadows from Rect Lights to disappear
UE - Graphics Features - Lumen - Nov 6, 2020Disabling Shadow Denoiser causes raytraced shadows from Rect Lights to disappear ...
Client Ensure FShaderMapResource_SharedCode::ReleaseRHI is still referenced on exit/shutdown
UE - Niagara - Rendering - May 7, 2024Very rarely, the game client will crash on shutdown and the log will contain messages that look like: LogOutputDevice: Error: Ensure condition failed: false [File:Engine\Source\Runtime\RenderCore\ ...
Backwards-compatibility broken for the CDOs of Python-generated Unreal Types because of missing redirectors
UE - Editor - Workflow Systems - Feb 11, 2025Previously, all Unreal Types generated by python scripts would be created inside package "/Engine/PythonTypes". This was changed by [CL 32478991 in ue5-main branch], which meant to "remove the restr ...
Invalid DumpGPU capture when ProjectDisplayedTitle contains special utf8 chars
UE - Graphics Features - Mar 7, 2025Placing a special UTF-8 character into the "ProjectDisplayedTitle" will result in GPU dumps failing to open. This appears to be because the dump will switch between us-ascii and UTF-16 file formats ...
Movable Skylight with DFAO creates Dark Areas when Combined with Reflective Material
UE - Graphics Features - Jun 9, 2016A user on the AnswerHub pointed out that his reflections when using a Movable Skylight with Distance Field Ambient Occlusion produces black results when combined with a reflective material. I trace ...
Using /*/ to create multiline comments in header files can prevent Visual Studio from successfully building a project.
UE - Foundation - Core - Aug 7, 2015If a multi-line comment is made in a header file using the format /*/ at the beginning and ending of the comment, UHT will fail to compile the project and will display the following errors: 1> C:/ ...
Crash using Import Commandlet on FBX that gets "Bones are too small" error when imported manually
UE - Editor - Content Pipeline - Import and Export - Feb 23, 2017Crash using Import Commandlet on FBX that gets "Bones are too small" error when imported manually Error from manual import: Warning The bone size is too small to create Physics Asset 'ButterflyVa ...
[CrashReport] UE4Editor_CoreUObject!UPackage::Save() [savepackage.cpp:4597]
UE - Gameplay - Blueprint Compiler - Jul 14, 2017This is a common crash affecting users in 4.16. Users have not provided additional information. Source Context// Set the parent index, ifthis export represents a UStruct-derived object 4589 ...
Unable to compile BuildPatchTool
UE - Foundation - Core - Nov 2, 2017Attempting to build the BuildPatchTool program fails due to a missing .h that was likely relocated. This may be related to, and is at least similar to, another issue where ShaderCacheTool is also un ...
Enabling Preview Rendering Level Mobile GLES3.1 on Map With Vector Fields Results in Editor Crash
UE - Platform - Mobile - May 21, 2018Reproduced Crash on 4.18.3, 4.19.2, and Main CL 4081612. Licensee states: Based on a quick inspection of the code, it seems FVectorFieldVisualizationVertexFactory::ShouldCache() returns false (req ...