Unreal Engine Issues
Unreal Engine Issues
BP multi-level inheritance does not correctly inherit 'Static' mobility
UE - Framework - Blueprint - Sep 8, 2022User reported an issue of a mesh not being visible when a project has multi-level blueprint inheritance. After reproing, I believe the root cause is DefaultSceneRoot of the grandchild BP class not c ...
Syncing issue when stopping and blending out a non-looping montage to an anim graph
UE - MVF Character - Animation - Feb 7, 2023When syncing from a non-repeating montage that is blending out to an anim graph, the anim montage is marked as a follower due to having its PrevMaker as an AnimBoundary(-1), furthermore in this case ...
Blueprint spawned by Visual Dataprep does not run construction script
UE - Editor - Open File Formats - Visual Dataprep - Mar 9, 2023Notice that the actors created through dataprep does not exectute the construction script while the actor spawnd directly in the scene does. Reported in the UDN [Link Removed] ...
Parameters show up in material instances even if they're not supposed to be exposed
UE - Rendering - Architecture - Materials - Feb 28, 2018In this case, I've added inputs to a material function. That material function input uses a parameter as it's default value. [image: Inline image 1] When referenced in the shader[image: Inline ima ...
Cloth painting - Camera movements are broken once leaving the painting tool.
UE - Runtime - Simulation - Aug 29, 2023Possibly a regression, but I could reproduce this issue as far as 5.2, so unsure when it started. The issue seems to be that the cloth painting tool lock the camera movements during painting, but d ...
Error when exporting large model to FBX binary
RS - Editor - Sep 16, 2024It's happening when exported models have over 150 million triangles. Project: [Link Removed] Note: Reported in the Elite Slack channel. ...
Automated tests DynamicSubobjectInstancing and NonNativeInstancedSubobjects (CoreUObject group) fail
UE - Framework - Dec 15, 2025The DynamicSubobjectInstancing and NonNativeInstancedSubobjects automation tests fail. ...
geometry script AppendSimpleSweptPolygon can crash if called with empty path
UE - Graphics Tools - Modeling Tools - Apr 26, 2022geometry script "Append Simple Swept Polygon" crashes if called w/ an empty path (but non-empty cross section polygon) ...
Opening a Niagara asset that references a disabled plugin (Chaos Niagara) can crash the editor
UE - Rendering - Architecture - Niagara - Jan 18, 2024Opening a module with references to a disabled plugin can crash the editor. ...
LIVE: On MAC, Atmospheric Fog Preview Renders Incorrectly with Default Settings
UE - Platform - Apple - Nov 14, 2014On a Mac, Following the tutorial located here: https://answers.unrealengine.com/questions/132223/macbook-pro-preview-rendering-issues.html When opening a new level, the atmospheric fog renders soli ...