Unreal Engine Issues
Unreal Engine Issues
Crash When Loading Cooked Material Assets in Editor Due to Shader Serialization
UE - Rendering Architecture - Shaders - Aug 27, 2025In Unreal Engine 5.6+, the new shader serialization logic in FShaderMapResourceCode::Serialize does not correctly handle cooked assets that are loaded back into the editor (e.g., from a mounted .pak ...
GAS: Double attributes not shown GameplayDebugger
UE - Gameplay - Gameplay Ability System - Aug 27, 2025Context The Gameplay Ability System lets devs specify numerical attribute properties in UAttributeSet subclasses. Although the preferred attribute property type is FGameplayAttributeData, GAS has l ...
GAS: GameplayAttribute picker incorrectly also lists AttributeSets' non-attribute properties
UE - Gameplay - Gameplay Ability System - Aug 21, 2025Context: FGameplayAttribute's details customization lets designers pick any attribute property from any UAttributeSet class. Problem: This currently displays all properties of UAttributeSet class ...
[PCG] Create PCG Asset from Level crashes on loaded sub-level exports
UE - World Creation - Procedural Tools - PCG Workflow - Aug 21, 2025PCG Level Asset export doesn't support exporting a level while it is loaded as a sub-level. We should warn the user instead of crashing. ...
FMediaFoundationMovieStreamer::Init() returns true even if the movie could not open.
UE - Media Framework - Aug 20, 2025Bake to Control Rig blueprint function does not work on tracks in nested sequences in Editor
UE - Anim - Sequencer - Aug 20, 2025The Bake to Control Rig node only works with single-layered level sequences. Studios using a nested level sequence setup cannot use this function. [Link Removed] ...
RayTracing - Nanite Foliage assets do not display shadows properly when painted with Foliage Tool
UE - Graphics Features - Ray Tracing - Aug 18, 2025Crash when a Deferred Decal (Translucent) base material has a Nanite Override (Masked Surface) Material and the mesh has Nanite + Ray Tracing enabled.
UE - Graphics Features - Ray Tracing - Aug 14, 2025A crash occurs when Nanite override material instance is used in a project with Ray tracing enabled where: 1 The Material assigned to the static mesh uses Deferred Decal / Translucent and the Nani ...
Rect Light not rendered correctly when using Virtual Texture as source texture
UE - Graphics Features - Aug 14, 2025Licensees have reported that this issue occurs when rendering from the command line: Rectangular lights with virtual textures do not render when you run the "Render (Remote)" button in the Editor, a ...