Unreal Engine Issues
Unreal Engine Issues
[Quartz] - The multiplier does not always respected on the Quartz Quantization Boundary
UE - Audio - Quartz - May 13, 2022Increasing the multiplier past a certain point causes sounds on a Quantization Boundary to struggle to play at the correct time. The repro above uses 1/32, but this also repros with other values. ...
Foot Placement Node does not account for Mesh and Actor Scale
UE - Anim - Runtime - Anim Blueprints - Jun 17, 2025When scaling down the character in the Game Animation Sample to 0.1 (Actor Scale or Mesh Scale), the lower body becomes crouches, not taking into account the difference in pelvis and foot difference ...
App crashes when Launching on or launching packaged project on tvOS or iOS
UE - Platform - Mobile - Aug 1, 2016Launch on to tvOS crashes the app on the device and returns the user to the main screen. This also affects packaged projects Update Project packaged in shipping configuration launched successfully ...
USkinnedMeshComponent::PredictedLODLevel can be set below MinLOD
UE - Anim - Rigging - Aug 12, 2019Within USkinnedMeshComponent::UpdateLODStatus_Internal, if the USkinnedMeshComponent does not yet have a MeshObject, MaxLODIndex will be left as 0 and as a result PredictedLODLevel will be set to 0 ...
Nodes to the right of an Abort Both node in a Behavior Tree appears to still receive a tick
UE - AI - BehaviorTree - Feb 6, 2023This is a regression. Tested in //UE5/Release-5.0 CL20979098 Behavior Tree appears to tick nodes to the right of an aborted node that is set to abort Both. Those nodes are not executed, but visuall ...
Applied external forces to vehicles may be nullified by sleeping
UE - Simulation - Physics - Solver - Jan 12, 2024If Entering sleeping state and applying external force are same time, the external force is nullified and the vehicle stops immediately. p.Chaos.Solver.SleepEnabled 0 or __ setting SleepLinearVel ...
Building lighting fails on Linux without Internet connection
UE - Platform - Linux - Jul 6, 2015Attempting to build lighting will stay at 0% and eventually fail if there is not internet connection for the computer. ...
[Audio Import] - Cue Points are stripped on import on 24-bit wave files
UE - Audio - Jul 12, 2022When importing wav files with a higher bit depth than 16, any cue points on the file are stripped. ...
Sound Cues report incorrect MaxDistance when using SoundNodeParamCrossFade
UE - Audio - Apr 23, 2015Short duration sounds (< 1.0 seconds) trigger a check on max distances by sound nodes in a sound cue. Sound cues which use SoundNodeParamCrossFade are reporting 1.0 as the max distance and thus resu ...
Meshes often render or flicker black in one eye on OSVR
UE - Platform - XR - May 6, 2016Found on: //UE4/Dev-VR CL-2967563 Often, meshes will render completely black in one eye on the OSVR. This seems to affect close meshes more frequently than far away ones. Sometimes the meshes flick ...