Unreal Engine Issues
Unreal Engine Issues
Unnatural de-overlap occurs when moving inside a mesh-type collision located far from the origin
UE - Simulation - Physics - Jan 8, 2025The problem appears to occur when the distance from an edge is mixed with positive and negative values in VectorEPA function. The following workaround is suggested that uses absolute values of dista ...
[CrashReport] UE4Editor_UnrealEd!SaveWorld() [filehelpers.cpp:359]
Tools - Aug 31, 2016This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below. Error message: Assertion failed: !bIsReentrant [L ...
Motion Controller meshes do not track with Motion Controller position within VRMode
UE - Platform - XR - Feb 8, 2019This is a regression from release 4.21.2 Motion controller meshes are present in the level, they just aren't tracking alongside the motion controls. Motion controls still function as intended othe ...
GeometryCaches don't implement CreateHitProxies to create a unique hitproxy per section/material
UE - Editor - Content Pipeline - Datasmith - Sep 3, 2021This causes the ObjectId pass in MRQ to fail to distinguish between materials in the resulting Cryptomatte file. It looks like FGeometryCacheSceneProxy doesn't implement CreateHitProxies so it's f ...
Objects do not Scale relative to their Temporary Pivot Point (Alt+MMB Click)
Tools - Mar 19, 2015After temporarily moving the pivot point (Alt+Middle Mouse Click on the center of the translate tool), you can switch to scale. However, the object still scales from it's original (permanent) pivot ...
Linux editor windows are completely black
UE - Platform - Mobile - Apr 10, 2017All of the editor windows are completely black on the Linux machine with the exception of the splash screen. This occurs for the Unreal Project Browser, toast windows and game windows. The functio ...
Creating SplineMeshComponents along Spline causes crash
Tools - Aug 22, 2018Attempting to procedurally create SplineMeshComponents along the spline of a SplineComponent via a derived SplineComponent class's constructor causes the project to crash. It runs into an ensure mes ...
D3D12RHI keeps increasing uniform buffer memory with "stat RHI"
UE - Rendering - Architecture - RHI - Oct 25, 2019If any skeletal meshes are not displayed, it stops increasing. Allocation count of uniform buffer is stable. added on February 26 Followings are an additional information from licensee. FD3D12 ...
Setting Slate.ShowBatching to 1 makes the entire screen green unexpectedly
UE - Editor - UI Systems - Slate - Jun 19, 2025This issue may have occurred due to a refactoring of the related functionality during the engine update from version 5.4 to 5.5. The main reason is that the randomization of BatchColor doesn't work ...
Differences in Post Process FX between Minimized and Maximized Viewport
UE - Graphics Features - Apr 19, 2016When scaling the viewport window using the Maximize/Minimize viewport option, the post processing effects applied to the screen do not scale properly. This issue seemed trivial at first, as the use ...