Unreal Engine Issues
Unreal Engine Issues
Substrate Unlit editor view mode renders black with Blendable GBuffer
UE - Rendering - Features - Shading Models - Mar 18, 2026When using Substrate materials with SUBSTRATE_GBUFFER_FORMAT==0 (Blendable GBuffer), the Unlit editor view mode renders completely black. TopLayerData.UnlitViewBaseColor is never populated in the bl ...
Notifies placed on the first frame of a montage using root motion don't fire
UE - Runtime - Animation - Aug 10, 2026This is a regression in 5.8 caused by 47265321. It's because we now perform the montage update and dispatch the queued notifies via CharacterMovementComponent::TickCharacterPose. But that all hap ...
Expand Node crashes engine
UE - Gameplay - Blueprint - Dec 4, 2014The engine crashes when after right-click > Expand Node on any composite node. Crash Report: [Link Removed] ...
GPU Particle Collision changes based on Normal Intensity on Colliding Surface
UE - Graphics Features - Jun 18, 2015Increasing the intensity of a Normal Texture on a colliding surface will cause the collision of GPU particles to behave strangely, looks to be falling through floor, when you are using a Constant Ac ...
Attaching a Skeletal Mesh by setting it's Parent Socket causes the mesh to be offset and rotated
UE - Gameplay - Oct 9, 2015Attaching a Skeletal Mesh by setting it's Parent Socket causes the mesh to be offset and rotated User Description: I still need to test using the BP you recommended. I tried again using the charac ...
'HighResShot 2' is not taking a screenshot for a packaged project
UE - Graphics Features - Mar 19, 2015When you attempt to take screenshot in a packaged project with the Console Command 'HighResShot 2'. This command works in editor but not in a packaged project. Issue with packaging in Main CL# 248 ...
Changing the directional light from stationary to movable causes the mobile preview to show dark
UE - Graphics Features - Nov 5, 2014When Changing the Light source in the Sci Fi Hallway from stationary to movable, the room will become dark on Mobile preview. ...
Crashing when attempting to open a Room blueprint in a users project
UE - Gameplay - Blueprint - Jan 28, 2015A crash is occurring in this users project when you open one of the Room Blueprints in the users project. Unable to recreate unless using the users project. Crash Reporter: [Link Removed][Link Re ...
Adding ProceduralMeshComponent Class to a project prevents the code from compiling
UE - Gameplay - Aug 5, 2016After adding a classed based on ProceduralMeshComponent the code for the project does not compile any longer. **This is a Regression - Adding ProceduralMeshComponent class would compile successfull ...
Packaged projects do not render in web page using Safari 10.0
UE - Platform - Mobile - Aug 9, 2016My Macbook Pro uses an Nvidia GeForce 750M and was on Safari 10.0 when this occurred. This did NOT occur on a Macbook Pro with the same card and using Safari 9.1.2. This did NOT occur on an iMac wi ...