Unreal Engine Issues
Unreal Engine Issues
Performance slowdown when ray tracing is disabled due to SetResidencyPriority
UE - Rendering - Architecture - RHI - Jul 17, 2025When a game is compiled with ray tracing disabled (D3D12_RHI_RAYTRACING=0) and the GPU the game is running on becomes low on VRAM, frame time is negatively impacted and doesn't recover. The D3D12_RH ...
Lumen Translucency lighting vs opaque mismatch is larger than expected
UE - Graphics Features - Lumen - Sep 5, 2025The licensee's VFX team has been struggling with getting their Niagara systems with translucent materials to fit into the environments they are being used in. In a project with default settings, the ...
Crash when clicking on a "Two Bone IK" node
UE - Gameplay - Blueprint - Mar 5, 2015Crash when clicking on a "Two Bone IK" node in an Animation Blueprint Crash Reporter currently down, see callstack section. Log and dmp are attached ...
Uasset causes editor to crash when opened/right clicked
UE - Gameplay - Blueprint - Oct 21, 2014Character asset will crash the editor immediately when opened or right clicked. Crash Report: 431837 ...
HydroErosion on landscape crashes on Linux
UE - Platform - Linux - Mar 13, 2015While on a Linux OS, the editor immediately crashes if the Hydro Erosion tool is used on a landscape. ...
This project crashes when one Blueprint is compiled if its child Blueprint is opened in another tab
UE - Gameplay - Blueprint - Mar 18, 2015This project crashes when one Blueprint is compiled if its child Blueprint is opened in another tab. This only occurs with one Parent/Child combination: the crash occurs when compiling Building whil ...
Editor crashes when attempting to doubleclick static mesh in content browser
UE - Graphics Features - Jan 16, 2015Edit: Fatal error: [Link Removed] [Line: 1467] Couldn't find Shader TShadowDepthVSVertexShadowDepth_OutputDepthfalse for Material Resource M_Base_Advanced_blend! With VF=FLocalVertexFactory, Platf ...
Spline blueprints cause negative values in Scene Outliner until build pressed again
Tools - Nov 6, 2014Moving a spline mesh in the viewport causes negative values to be applied in the scene outliner actor count until the level is built again. ...
Linux editor does not have a proper icon
UE - Platform - Linux - May 22, 2015Linux editor (and other tools) have default icons instead of proper UE4 ones. ...
Template animations pop upon looping
Docs - Samples - Feb 10, 2015The animations in the following code and blueprint templates pop upon looping SideScroller -SideScrollerRun -SideScrollerWalk SideScroller2D -RunningAnimation ThirdPerson -ThirdPersonRun -ThirdPers ...