Unreal Engine Issues
Unreal Engine Issues
SKP Import - Materials for certain groups appear black in Path Tracer when using Keep Hierarchy
TM - Interoperability - Mar 3, 2025Reported by a client in SF [Link Removed] When importing SKP files using the Keep Hierarchy collapse mode, some imported objects in Groups inside SketchUp will appear black in Path Tracer. Appears ...
Instanced Properties remain after compile
UE - Gameplay - Blueprint Editor - Jan 25, 2018Our team has been using property instances, and have run into several problems. We were able to reproduce one of the problems, and I was hoping to have your team look at it. General scenario. We ha ...
Mouse Not Functioning Correctly with Multiple Displays Connected to Mac
UE - Platform - Apple - Apr 24, 2015When using mutliple monitors connected to a Mac the mouse behavior does not function well. Attempting to navigate and drag windows to and from individual displays proves difficult. The user reporti ...
The AABBTree spatial acceleration structure goes off-sync when physics substepping is enabled in a "low" framerate environment.
UE - Simulation - Physics - Mar 15, 2024When you enable the physics substepping, if you run the console command p.Chaos.Solver.DebugDrawSpatialAccelerationStructure 1, you can see how does not follow the physical object. The user that rep ...
Clear Coat looks incorrect in the Preview when Energy Conservation on Material is enabled for non Substrate rendering
UE - Rendering Architecture - Materials - Apr 11, 2024Enabling Energy Conservation on Material makes Clear Coat Material look weird in Preview. It looks fine in the Level Editor, but not in any "Preview" type viewport (Material Editor, Asset Thumbnails ...
Lighting data wiped if sub level is hidden while rebuilding lighting for visible levels
UE - Graphics Features - Jan 11, 2017When building lighting now you can no longer have a hidden sub level and have it retain it's built light if it was previously built. For instance, if you have a persistent level and hide the sub-lev ...
[CrashReport] UE4Editor_Engine!UMaterialExpression::GetOutputType() [materialexpressions.cpp:859]
UE - Rendering Architecture - Materials - Nov 21, 2017This is an infrequent crash in the 4.18 release. Users have not provided any descriptions of their actions when the crash occurred. Source Context 849 uint32 UMaterialExpression::GetOutputT ...
Stationary light shadow are occluded for additional players in split-screen mode
UE - Graphics Features - Jun 17, 2015When using split screen multiplayer the second or more players that are added for split screen will have their characters shadows occluded when the bounds are not within view of player 1. Setting ...
HLOD generated proxy doesn't create or assign target lightmap coordinate index any longer
UE - World Creation - Worldbuilding Tools - HLOD - Sep 6, 2016There are instances where HLODs will either generate a lightmap but not assign it to the correct Lightmap Coordinate index from the target lightmap setting in the HLOD outliner or the Lightmap will ...
Landscape renders default material if apply another material instance under ES31 preview
UE - LD & Modeling - Terrain - Landscape - Aug 27, 2019In ES3.1 preview, Landscape will render default material if change landscape material by using material instance of landscape's material. Will render correct if using another material's instance ...