Unreal Engine Issues
Unreal Engine Issues
Chaos Clothing CreateClothActor takes a long time with LODs and Self-Collision
UE - Simulation - Physics - Jan 21, 2024Spawning an actor with Chaos cloth causes a hitch when LODs or Self-Collision are enabled on the cloth. LODs and Self-Collision seem to compound the issue. Self-Collision requires a collision simul ...
Crash opening Child/Grandchild Blueprint after updating to 4.18
UE - Gameplay - Blueprint - Nov 29, 2017From this UDN: https://answers.unrealengine.com/questions/718928/4180-editor-crash-while-opening-child-blueprint.html Crash occurs when opening child (or in the repro case, grandchild) blueprints a ...
Enabling Merge GC Clusters and Blueprint Clustering causes a packaged Window project to crash
UE - Foundation - Core - Cooker - Jan 3, 2019Enabling the check boxes for Merge GC Clusters and Blueprint Clustering causes packaged Windows projects to crash on startup. The log and dump files regarding this crash have been attached to this t ...
[AI] UE_MT_SCOPED_READ_ACCESS(NavElementAccessDetector) Fails in editor on fresh sync
UE - AI - Navigation - Jan 27, 2025Licensees have reported failed multi-thread access code for NavElementAccessDetector in complex levels that have not finished compilation of their static meshes. The eventual failed check is inside ...
Users project crashes when opening level that loads multiple sub-levels
UE - Foundation - Core - UObject - May 31, 2017Users project crashes when opening level that loads multiple sub-levels. Unable to reproduce this in a clean project so the users project is provided though Epic's box account (link is in the repro ...
TMap does not serialize properly in specific circumstance when it contains a UObject property set to null by default
UE - Foundation - Core - Aug 8, 2018A TMap containing a struct with a UObject reference property (set to nullptr by default) does not serialize properly for an instance where the UObject reference is set on the instance, but the TMap ...
Exporting process stuck in "Estimated time" phase when uploading projects with Panorama Sets & Presentation after freshly booting TM
TM - Core - Dec 4, 2024Cloud Build: TWINMOTION CL app-2023.2.33001994-2024.1.37216540-2025.1.38508591-cloud-2024.12.02.095314 (DEV / STAG, CHROME) Issue: Exporting process stuck in "Estimated time" phase when uploading p ...
On static mesh import correctly named materials in project aren't automatically applied
UE - Editor - Content Pipeline - Import and Export - Jul 16, 2019When importing a static mesh into a project with the appropriately named materials in it already they won't apply to the mesh automatically when setting Search Location to All Assets without being i ...
Advanced Vechicle Template throws warning about no default skeleton when opening the physics asset
Docs - Samples - Dec 3, 2014DESCRIPTION: If you try to open the physics asset for the Advanced Vehicle template will throw a warning that the physics asset has no default skeleton and that it will be replaced with the default ...
Rarely, unmodified Niagara will cause diffs and bloat the patch.
UE - Niagara - May 3, 2022Attached is a project that picks up Niagara from the content sample. The probability of reproduction is about 1/10. The simpler the project, the lower the reproduction probability. I am attaching ...