Unreal Engine Issues
Unreal Engine Issues
Crash when adding sphere reflection capture to a scene
UE - Graphics Features - Jan 30, 2017An occasional crash occurs when adding a sphere reflection capture to the scene from the place mode panel. This issue has a low repro, but has been seen a couple times. Repro rate seems to be around ...
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. ...
Increased load times in a packaged project
UE - Foundation - Core - Nov 10, 2017There appear to be longer load times between 4.16 and 4.17/4.18 when opening a packaged project. Possible regression from 4.16 ...
Rhino extrusions have high tessellation values after being imported with DataSmith
UE - Editor - Content Pipeline - Datasmith - Importer - Nov 28, 2018When importing Rhino 'Extrusions' with Datasmith results in extremely dense meshes. A simple box can end up having thousands of vertices. This issue was reported and tested in 4.21 (4.21E0). This ...
Lighting channels on static mesh doesn't change correctly at runtime
UE - Graphics Features - Aug 28, 2020If call SetLightingChannels in blueprint to set a static mesh's lighting channels at runtime, the mesh in the viewport seems can't update to the new lighting channel setting. A weird thing is, if ...
AfterMotionBlur Translucent Material With Local Exposure Enabled Causing Artifacts
UE - Graphics Features - Feb 20, 2025When TSR is enabled, translucent materials using the AfterMotionBlur translucency pass cause visual artifacts when local exposure is active. The artifacting is believed to occur because the local ex ...
LastRenderTime does not update when Occlusion Culling is disabled
UE - Graphics Features - Feb 25, 2025When disabling Occlusion Culling, Components will not have their Last Render Time updated. ...
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 ...
Transform does not update after first time for Instance Static mesh in Blueprint Editor
UE - Gameplay - Blueprint Editor - Mar 2, 2017In 4.15 When you update the transform of an instance static mesh a second time the editor does not update the location, to get the update to display correctly you must close and re-open the blueprin ...
Sequencer Render: Animation not updating for a moment on camera cut
UE - Anim - Sequencer - Mar 17, 2017When rendering from sequencer to an image sequence, character animation stops for 2 frames after a camera cut. This hitch does not occur when playing the sequence in PIE I've attached some sample d ...