Unreal Engine Issues
Unreal Engine Issues
Precaching global shaders with r.PSOPrecache.GlobalShaders = 2 crashes on startup
UE - Rendering - Architecture - RHI - Feb 19, 2026A licensee has reported that they are trying to run a cooked project with r.PSOPrecache.GlobalShaders=2 and running into a crash. They believe the problem is in PrecacheComputePipelineStatesForGlob ...
Textures are Blurry when Scaling an Actor While r.Streaming.DropMips is Set to 2
UE - Graphics Features - Jul 17, 2019If a BP actor containing textured static meshes starts with a small transform scale, when scaled up, the texture streamer fails to load in the higher mips and the texture looks blurry. Working as e ...
Split screen - Player 2 doesn't receive input when created with Create Local Player node
UE - Gameplay - Input - Jan 4, 2023This is a regression. Tested in //UE5/Release-5.0 CL20979098. Split screen extra controllers ignored when using Create Local Player node. May just be Enhanced Input related. ...
Migrating a project from UE5.2 to UE5.3.1, there was a difference in the navmesh generated on HISM
UE - Runtime - Character - Oct 24, 2023HISM is generated by ConstructionScript Actor is placed on the level and navmesh is generated on top of HISM. In UE5.2, the navmesh was generated without splitting on the HISM. In UE5.3, a break occ ...
Objects with physics enabled do not show up in 4.7 preview 2 (when upgraded form 4.6)
UE - Gameplay - Jan 12, 2015After upgrading from 4.6 to 4.7 preview 2 objects that are set to simulate physics will not show up if the user uses the mobile preview. ...
Frame specific functionality unusable in Composite/Montage editors post 5.2 changes
UE - Runtime - Animation - Jul 20, 2023Part of the changes for 5.2 required UAnimCompositeBase::GetSamplingFrameRate to be changed to return a very high framerate. This has the unintended consequence of effectively making the functional ...
Fix up redirectors can fail if some packages were already checked out
UE - Editor - Jan 4, 2023Fix the skeletal mesh merge tool material assignment, change the API to avoid confusion
OLD - Anim - Jul 25, 2018UDN user ask us to change the API for the material to remove confusion with the material ID. Also apparently there is an issue with the skeletal mesh merge tool, the user did not give any repro ste ...
Level Bounds Incorrectly Calculated If Particle System Does Not Have "Use Fixed Relative Bounding Box" Enabled
UE - Niagara - Jul 26, 2018If "Use Relative Fixed Bounding Box" is disabled, level bounds will be incorrectly calculated. This seems to be similar to [Link Removed]. Found in 4.19 CL# 4033788, 4.20 CL# 4212847, 4.21 CL# 4233 ...