Unreal Engine Issues
Unreal Engine Issues
Trace Hit.Z varies strangely based on trace start/end Z
OLD - Anim - May 8, 2017The Z value of a trace hit will vary based on the Z value of the start/end points of the trace. The larger the start/end Z range, the larger the variance of Hit.Z values. ...
Realtime Rendering toggle disabled after using Cloth Painting
UE - Runtime - Deformable - Jul 29, 2021After finishing cloth painting, the ability to toggle Realtime Rendering in the viewport is greyed out. Additionally, the Disable Realtime Override button doesn't seem to have any effect. This probl ...
Adjusting Vegetation Growth for Bushes in Media Mode alters their global size settings
TM - Tools - Jun 25, 2026Reported in SF [Link Removed] When making adjustments to the Vegetation growth Season parameter inside Media Mode, if a scene contains Bushes then any adjustments to the Vegetation growth will adju ...
DefaultSceneRoot causes Get Actor Bounds to Return 128
UE - Gameplay - Jun 1, 2016When using the Default Scene Root component in a blueprint with no additional components, the box extent of the Get Actor Bounds node is returning 128,128,128 instead of the expected 0,0,0. If you ...
Draw at desired size does not return to being false when unchecked
UE - Editor - UI Systems - Aug 4, 2017When setting "draw at desired size" for a widget component to true, the "Draw size" will no longer respond to input. ...
Asynchronous Image Loading from Disk Documentation leads to memory leak
Docs - Sep 18, 2019The documentation example to create your own asynchronous image load from disk results in a memory leak that is noticeable using the task manager. ...
If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible
UE - Virtual Production - Tools - Jul 31, 2025If any light source is deleted, and a single light has its visibility state changed in LightMixer, all the other lights in the scene that were invisible turn visible. The behavior only shows after d ...
Oculus Avatar Plugin fails to package on Oculus Mobile
UE - Platform - XR - Feb 22, 2019Does NOT occur in 4.23 MAIN @ CL 5035898 Deleting Engine\Plugins\Runtime\Oculus\OculusAvatar\Intermediate did not resolve error. Warnings that are also present in 4.21: LogShaderCompilers: Warnin ...
Material Editor Viewport does not display World Position Offset
UE - Rendering - Graphics Features - Mar 19, 2026The preview Viewport in the Material Editor does not correctly render World Position Offset. It appears that the RenderVelocities pass (which is also drawing the depth for the preview sphere) does ...
Foliage Instanced Static Meshes disappear when FISM Component BP is compiled
UE - World Creation - Worldbuilding Tools - Foliage - Nov 10, 2017This bug removes foliage from a level when the Component Blueprint is compiled. Switching the Foliage type asset to another component will cause the issue to stop occurring. The Component Blueprint ...