Unreal Engine Issues
Unreal Engine Issues
Crash due to memory after opening the World Partition window with large objects
UE - World Creation - Worldbuilding Tools - World Partition - Dec 8, 2022Regression: Tested in UE5/Release-5.0, this issue does not occur so regression is yes. Reproducing this issue has a mixed reproduction rate. I have gotten the editor to crash when scaling the cube ...
Forward Rendering causes Volumetric Material to not render against background
UE - Graphics Features - Nov 15, 2022Regression: Tested in UE5/Release-5.0, and the issue is reproduceable. This issue appears to occur when the SkySphere is deleted from the level, as leaving the SkySphere in the level causes the Vol ...
Changing Shadow Quality causes SingleLayerWater Materials to disappear
UE - Rendering Architecture - Materials - Nov 15, 2022Regression: Tested in UE5/Release-5.0, issue is reproduceable. This issue appears to be related to the Opacity Mask of the material, as not having an Opacity Mask does not cause the material to dis ...
Building Lighting will Generate Additional Lightmaps after Rotating Lightsource
UE - Graphics Features - Jul 7, 2015Lightmap sizes seem inconsistent after rotating a light source and rebuilding the lighting. This causes concern about file sizes when packaging the project that is using baked static lighting. The ...
Lansdcape grass generation fails on Mac running OSX 10.10.1
UE - Platform - Mobile - May 12, 2015Grass map heights all appear to be 0 when generating grass on a Mac running 10.10. This bug does not occur on Macs running OSX 10.9.5 Putting a breakpoint in LandscapeGrass.cpp line 476 you can se ...
Missing Triangles on scaled MetaHuman assets with Nanite enabled
UE - Graphics Features - Nanite - Feb 19, 2025Additional information: only happens when all three conditions are true: the camera is very close to the character, the MH is Nanite, and a scaled mocap animation is appliedmaterial is opaque, shows ...
Import Threashold Time setting ignores decimal entries
Tools - Aug 10, 2016Import Threshold Time setting in Editor Preferences does not accept values with a leading decimal point (.25 vs 0.25). UEditorLoadingSavingSettings::AutoReimportThreshold in EditorLoadingSavingSett ...
Duplicate .so files in GoogleVR.
UE - Platform - XR - Jun 2, 2017A licensee recently pointed out that there are now several GoogleVR lib files in 4.16 that are present in the Engine twice due to some of them being copied into a subdirectory. For example, , in 4.1 ...
Crash When Toggling Visibility of Level with Planar Reflection
UE - LD & Modeling - Terrain - Landscape - Mar 26, 2018This crash occurs in 4.19 and 4.20 but not 4.18. Repro'd in 4.19.0-3944462 and 4.20.0-3955769 and 3964322. This is a regression. Per UDN licensee: When I'm showing/hiding levels in editor (in le ...
"Enabled per poly collision" under "Support compute skincache" is ON causes a crash at runtime
UE - Simulation - Physics - Aug 16, 2018It seems that "Enabled per poly collision" with "Support compute skincache" causes a crash at runtime immediately. We can easily reproduce it with ContentExample. The logs at the crash timing... L ...