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 ...
Crash-Connecting output of unspecified functions to pins on the material result node
UE - Rendering Architecture - Materials - Dec 6, 2017Crash-Connecting output of unspecified functions to pins on the material result node. This does occur in Main at CL: 3792526 ...
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 ...
Planar Reflections on Mobile short view distance for non single plane faces
UE - Platform - Mobile - Jul 7, 2016Planar Reflections on mobile work well with single plane assets but not with anything with multiple sides, like a box. Tested in: 4.12.4 CL-3028348 4.13 Dev-Editor CL-3038075 ...
Crash when implementing interface to child blueprint and then implementing it with parent blueprint
UE - Gameplay - Blueprint - Jul 11, 2016If the user uses a Blueprint Interface in children Blueprints and then goes to the parent Blueprint and tries to implement the same Blueprint Interface in the parent Blueprint, the editor will crash ...
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 ...
Using the arrow keys to navigate the Attach To dropdown causes accidental selection
Tools - Sep 27, 2016When using the arrow keys to navigate the Attach To menu, the first actor that is highlighted will automatically be selected instead of allowing the user to select the actor they wish. Regression?: ...
Character Using Move to Location or Actor Stutters
UE - AI - Jun 9, 2016Characters using Move to Location or Actor will briefly pause with each few steps during their movement. This did not occur in 4.11.2 binary, this is a regression. Found in 4.12.1 binary. Reproduc ...
[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 ...