Unreal Engine Issues
Unreal Engine Issues
CreatePatchLibrary is broken
UE - Rendering - Architecture - Shaders - Nov 12, 2025It seems the FEditorShaderCodeArchive.LoadExistingShaderCodeLibrary missed some functions, use FEditorShaderCodeArchive.AddShaderCodeLibraryFromDirectory instead could fix the issue. ...
Megalights support for anisotropic materials
UE - Rendering - Graphics Features - Lumen - Apr 14, 2026A licensee noticed that SUPPORTS_ANISOTROPIC_MATERIALS is not passed to FShadeLightSamplesCS::ModifyCompilationEnvironment for MegaLights ShadeLightSampleCS. Adding it fixes the issue. ...
Root component doesn't scale appropriately when defer spawning in C++
UE - Gameplay - Components - Feb 12, 2018Whenever defer spawning is used from the GameplayStatics library it is supposed change it's transform properties based on what is passed in as a parameter. Despite this, it seems the newly created a ...
Possessing and Unpossessing a Pawn when using NetCulling causes the Client to lock up
UE - Networking - Aug 1, 2019In this test bench, they are using a APawn with a custom replicated Movement Component rather than using a ACharacter and they are getting a different result that ends up in a permanent softlock of ...
Behavior tree assets marked dirty when opening in subeditor
UE - AI - Aug 16, 2016Found while I was fixing up other content, that Behavior Tree assets are being marked dirty by just opening them into sub editor. ...
Widgets in retainer boxes cannot use drag feature
UE - Editor - UI Systems - May 5, 2016Widgets in retainer boxes cannot use drag feature Regression (No) issue (does) occur in 4.11.2 ...
8.1 Advanced asset creation selection is flickering a duplicate selection
Tools - Apr 26, 2017Workaround Seemed that closing and reopening the project resolves this issue This is NOT a regression as it happens in 4.15.2 ...
SSR not rendering correctly in SM4 Preview
UE - Graphics Features - Sep 20, 2017This is a regression from 4.17.2 and you do not need to be in PIE to see the effect. This is not seen in Shader Model 5 ...
Moving or renaming a file in the editor should execute a Perforce move command not a delete+add
Tools - Aug 31, 2016Moving or renaming a file in the editor erases its perforce history. It should execute a move not a delete + add to fix this ...
Hot reload iteration time regression.
UE - Foundation - Core - Oct 19, 2017Hot reload iteration times have been crippled ever since CL# 3332960, which was a fix for [Link Removed]. ...