Unreal Engine Issues
Unreal Engine Issues
'GetClassDefaults' Can Cause Blueprint To Become Modified When Unrelated Blueprint Is Compiled
UE - Gameplay - Blueprint - Sep 22, 2023The stems from a really old change (CL 2948683) to fix [Link Removed]. Compiling ObjectA will call RefreshExternalBlueprintDependencyNodes on its dependent BP, ObjectB_ReferencesA, which reconstru ...
Substrate Unlit editor view mode renders black with Blendable GBuffer
UE - Rendering - Graphics Features - Substrate - 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 ...
Enabling World Composition Skips Intro Movies
Tools - Jun 24, 2016Startup movies are skipped when World Composition is enabled. Even with the 'Wait for Movies to Complete' option enabled, the startup movie plays for a very short time, and then the level is loaded ...
Moving Landscape causes Crash with Landscape Grass Output in Landscape Material
UE - LD & Modeling - Terrain - Landscape - Jun 16, 2016Editor crashes when utilizing the Landscape Grass Output node within a Material, and then attempting to move the landscape with the material applied. I narrowed this down to being directly related ...
XAudio2 DestroyVoice call causes significant hitching on some architectures
UE - Audio - Aug 10, 2015Another thread: https://answers.unrealengine.com/questions/241358/amd-cpu-very-low-performance-because-ixaudio2sourc.html Note: This not a regression and has existed since our first implementation ...
Shader compile error using Point Lights Nvidia Shield
UE - Platform - Mobile - Jan 19, 2016On the Nvidia Shield (portable with the controller attached) if you have a dynamic directional light and at least one dynamic point light no lights will be rendered in the level. Or even just using ...
Painted Vertex Colors not Passing Color when used with Emissive for Static Lighting Setting
UE - Graphics Features - May 24, 2016When painting Vertex Colors on a mesh, and enabling the 'Emissive for Static Lighting' option, the painted colors are not passed to surfaces receiving the emissive static lighting. The regular emis ...
Auto-weld is Enabled even if the blueprint component is set to Simulate
UE - Simulation - Physics - Jan 4, 2017Auto-weld is Enabled even if the blueprint component is set to Simulate. This only effects blueprint, static mesh actors in the world still disable Auto-weld if set to Simulate. This is a Regressio ...
Static Mesh Editor: Give options for drawing complex/simple collision
UE - Simulation - Physics - Mar 13, 2017The collision mesh and the display mesh are often similar enough to be difficult to differentiate, and there is currently no way to view the collision wireframe without the display wireframe as well ...
SBasePoseViewport should use ExtendedBounds, not ImportedBounds
UE - Anim - Rigging - Jun 16, 2020In accordance with CL-9139422 of [Link Removed], the SkeletalMesh ImportedBounds does not have an Extend operation. However, SBasePoseViewport, the UI for retagettes, continues to use ImportedBounds ...