Unreal Engine Issues
Unreal Engine Issues
Incorrect transforms when breaking a packed level actor
UE - Engine Scaling - Streaming - Level Instances - Aug 14, 2023See "Steps to Reproduce" ...
Network Prediction Insights tool checks/crashes with trace data from a multiplayer PIE session
UE - Runtime - Character - Mar 27, 2024Loading a trace in Insights that has Network Prediction channel data from a multi-client PIE session will hit a check and crash the Insights tool. ...
Issue where some colors are missing in some materials created by importing MaterialX files
UE - Editor - Open File Formats - Import and Export - Apr 1, 2024From user: Comparing UE, Arnold, Vray and MaterialXView that have MaterialX files imported, some materials of UE clearly look different from other renderers. Looking into this issue, we found that ...
Depth of field and Refraction issue
UE - Rendering - Architecture - May 15, 2024Refraction does not adjust the scene depth texture, leading to a mismatch between Scene Color samples and Scene Depth samples. ...
UserSceneTexture Post Process Material Renders Incorrectly When ScreenPercentage is Below 100
UE - Rendering - Features - Dec 17, 2024When using a UserSceneTexture in a post-process material, a visible rendering issue occurs if the viewport's ScreenPercentage is set to below 100. This issue looks like it might stem from an incorre ...
AfterMotionBlur Translucent Material With Local Exposure Enabled Causing Artifacts
UE - Rendering - Features - Feb 20, 2025When TSR is enabled, translucent materials using the AfterMotionBlur translucency pass cause visual artifacts when local exposure is active. The artifacting is believed to occur because the local ex ...
LastRenderTime does not update when Occlusion Culling is disabled
UE - Rendering - Features - Feb 25, 2025When disabling Occlusion Culling, Components will not have their Last Render Time updated. ...
[AI] StateTree Category = Input validation doesn't validate child properties
UE - AI - StateTree - Oct 10, 2025Normally if you have a property in your state tree instance data of the input property(Category = Input), when you compile the state tree, you will get errors if the property does not have a binding ...
Editor crashes when overriding Texture Collection in Material Instance
UE - Rendering - Architecture - Aug 6, 2026When a Material uses the DefaultTextureCollection and a Material Instance overrides it - or vice versa - the Editor will crash. Note: bindlessconfiguration=Minimal or higher must be enabled to use ...
Crash Occurs When Importing a .ABC File as Skeletal Mesh Into Project That Already Contains Asset's Materials
OLD - Anim - Jun 8, 2018Editor crashes when importing an .abc file as a skeletal mesh and the assets materials already exist inside the project. -Materials need exist inside project before import -If the .abc file is imp ...