Unreal Engine Issues
Unreal Engine Issues
Missing materials on the rear lights and windows of library vehicles
TM - Content - Oct 24, 2025Reported in SF [Link Removed] The rear light material and window materials on Twinmotion library vehicles are not present on many vehicles in TM 2025.2. Confirmed affected vehicles are in the foll ...
Assertion thrown while deleting a Curve from a Control Rig asset - DetailsViewWrapperObject.cpp: 231
UE - Anim - Rigging - Control Rig - Apr 1, 2022Assertion thrown while deleting a Curve from a Control Rig asset. ...
Editor crashes when attempting to play a recorded demo - Assertion failed: IsGameWorld() && GetCurrentLevel()
UE - Networking - Oct 9, 2018Editor crashes when attempting to play a recorded demo - Assertion failed: IsGameWorld() && GetCurrentLevel() This issue occurs when using a template project or QAGame. This does not occur when usi ...
Collision for bsp stays in level after bsp is deleted
UE - LD & Modeling - Modeling Tools - BSP - Jun 30, 2015If a bsp brush is deleted from a level, the level has geometry built, and the user presses play then uses the "show collision" console command, the collision for the bsp wlil still appear. This does ...
User cannot undo the automatic changing of Mobility settings
Tools - Sep 12, 2016When the users causes a component to automatically change its Mobility setting by changing that setting on a parent or child component, undoing that change only affects the manual change caused by t ...
[CrashReport] MetalRHI crash - void FForwardLightingParameters::Set<FRHICommandList, FRHIPixelShader*>
UE - Graphics Features - Jul 20, 2017This is a common crash affecting Mac users in 4.16. User DescriptionsI tried to build the lighting and it keeps crashingWhenever I attempt to build the project or change the preview rendering to IO ...
Deactivated Skeletal Mesh Component Plays Animation
UE - Gameplay - Components - Aug 15, 2017Animations on skeletal mesh components set to use an animation asset still play even when the component is deactivated. Found: 4.17 Reproduced: 4.16.3 & 4.18 Main CL# 3585944 ...
Scene Capture 2D Invisible When Mobile MSAA Enabled
UE - Platform - Mobile - Oct 11, 2017UDN Licensee (UE4.16) changed rendering settings from MSAA "none" to MSAA x4, resulting in Scene Capture 2D not showing up in mobile preview mode. I have reproduced same results in 4.17 and 4.18. ...
Literal Gameplay Tag Container's Return Value does not have ParentTags
UE - Gameplay - Oct 16, 2017Literal Gameplay Tag Container's Return Value does not have ParentTags in 4.17 and 4.18. In 4.16, the value had it. There is same problem in Return node that is Gameplay Tag Container Structure. In ...
Locked actors still moveable in VR Editor
UE - Editor - Workflow Systems - Jan 22, 2018Actors that are locked in the regular editor are able to be moved in VR Editor. Reproduced in 4.17.2 CL 3658906, 4.18.2 CL 3794801, and 4.19.0 P1 CL 3837072 ...