Unreal Engine Issues
Unreal Engine Issues
Material Emissive Color not working with SkyAtmosphereIlluminance Material Expression
UE - Graphics Features - Jan 9, 2025A licensee has reported that they are unable to use an emissive material utilizing the SkyAtmosphereLightIlluminance material expression together with Nanite and Lumen. The linked UDN has some more ...
Performance hitch from RemoveGeometryCache flushing the render thread
UE - Editor - Content Pipeline - Alembic - Jun 12, 2025FGeometryCacheStreamingManager::RemoveGeometryCache calls FlushRenderingCommands which shows up as a hitch when profiling. [Link Removed] Ideally the flush added in CL#23782411 to fix a rare deadl ...
If 'Enable Physics Interaction' is disabled, the player can still interact with physics objects
UE - Gameplay - Oct 22, 2015If 'Enable Physics Interaction' is disabled, the player can still interact with physics objects User Description: I have a Bus Vehicle with custom physics (skeletal mesh). So I can walk through th ...
Distance Fields no longer work with instances when PIE/Simulate
UE - Graphics Features - Apr 20, 2015When using distance fields with instance meshes from the foliage tool everything works correctly, however, when simulating or PIE the distance fields will be removed. This working correctly in 4.7.5 ...
Editor movement control regression
Tools - Jul 8, 2015Using Ctrl+Drag in 4.8 will not affect the location of selected actor if the viewport camera is facing away from selected actor. In 4.7.6 the actor would travel along the X axis even if the camera ...
Game sounds only play during first PIE editor session for Linux project
UE - Platform - Linux - May 11, 2015Games sounds will play as appropriate during first PIE session but subsequent PIE sessions have no sound until editor is closed / reopened. ...
Get Ping in ms returns 9999 in a packaged game when tested on systems not on the same network
UE - Networking - Feb 25, 2016Get Ping in ms returns 9999 in a packaged game when tested on systems not on the same network. This does not prevent Client connection to the Server. Note: my understanding is this would be caused ...
Joining a session in PIE with Auto Connect To Server disabled will crash PIE
UE - Networking - Nov 11, 2015Joining a session in PIE with Auto Connect To Server disabled will crash PIE. Note: this is not specific to the Multiplayer Shootout project used in the repro steps; this will occur in any project ...
Confusion over what assets are saved in Persona with the Toolbar button
OLD - Anim - Jun 24, 2015Some users appear confused as to why the skeleton is not saved when they add sockets while in Animation Editing Mode. Unsure what an elegant solution would be at this time. ...
The Default Value for a Timespan variable resets whenever its Blueprint is compiled
UE - Gameplay - Blueprint - Nov 30, 2014The Default Value for a Timespan variable resets to 00:00:00.000 whenever its Blueprint is compiled. ...