Unreal Engine Issues
Unreal Engine Issues
M_Volumetric_Sky_Prototype Material has compile errors
UE - Content - Engine - Mar 17, 2020The material "M_Volumetric_Sky_Prototype" has numerous compile errors that prevent it from being used. This was reported and tested in 4.25 Preview 2 (CL-12055273) and reproduced in 4.26 (CL-121923 ...
Problems in skeletal mesh merge
There are a few issues a licensee has found with the skeletal mesh merge operation. See the UDN for more details and the proposed fixes. Note, the issue with the cloth merge is already logged in a ...
Delay in updating coordinates in camera manager of sequencer
zComponent - Archive - Mar 18, 2022This problem was reproduced in 5.0 Preview 2. According to the licensee, this did not occur in 4.26. Not sure if this is related to the camera manager, but some objects are delayed at the end of s ...
UMaterialBillboardComponent does not render when moving
UE - Rendering - Features - May 19, 2022Marking this as a Regression since it works as intended in Release 4.27.2 (CL-18319896). I've also confirmed the behavior is occurring in UE5 Main (CL-20283975) as well. ...
bIgnoreAllPressedKeysUntilRelease only applies to keys in the previous mapping
UE - Gameplay - Input - Jun 16, 2022This is because the RebuildControlMappings function only checks this flag when you have a mapping that was already added, we should apply this for any new mappings as well. I'll update the repro s ...
Editor becomes unresponsive while Compiling with Save on Success of a Widget Blueprint that contains a Breakpoint in Pre Construct
UE - Framework - Blueprint - Aug 2, 2023This is not a regression. Tested in //UE5/Release-5.2 CL26001984 Editor becomes unresponsive after compiling with save on success a widget blueprint that has logic flagged with a breakpoint within ...
IES Texture Icon changes to a gradient bloom once assigned
UE - Editor - Sep 13, 2023This is not a regression. Tested in //UE5/Release-5.2 CL26001984 After assigning an IES Profile to a light the icon for that profile updates to a gradient bloom preventing the profile from being pr ...
Water body constructor dirties actor
UE - Graphics Tools - Terrain - Water - May 29, 2024Modify gets called from AWaterBody constructor: WaterSplineMetadata->Reset(3); WaterSplineMetadata->AddPoint(0.0f); WaterSplineMetadata->AddPoint(1.0f); WaterSplineMetadata->AddPoint ...
Poor Vulkan RHIThread performance in Development builds on some Android
UE - Platform - Mobile - Systems - Dec 10, 2024Community-attempted workaround received in [Link Removed] Closed Correct fix submitted to 5.6 FNMain in [Link Removed] whic ...
Niagara Regression - Looping particle with Spawn Burst Instantaneous on time 0.0 flickers for a frame between loops
UE - Rendering - Architecture - Niagara - Jul 16, 2025Note: This worked correctly up to UE 5.4, but repros from UE 5.5 up to mainline latest. If a Niagara Emitter is set up with "Spawn Burst Instantaneous" on time 0.0, and the spawned particle(s) have ...