Unreal Engine Issues
Unreal Engine Issues
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Performance slowdown when ray tracing is disabled due to SetResidencyPriority
UE - Rendering Architecture - RHIWhen 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 ...
Niagara Regression - Looping particle with Spawn Burst Instantaneous on time 0.0 flickers for a frame between loops
UE - NiagaraNote: This worked correctly up to UE 5.4, but repros from UE 5.5 up to mainline latest. If a Niagara Emitter is set up with "Spawn Burst Inst...
Adding vertex color to a model that has morph targets, removes or invalidates the morph targets.
UE - Anim - Rigging - Skeletal EditorInconsistent texture loading issue within material editor
UE - Rendering Architecture - MaterialsA licensee has reached out via EPS about a texture loading issue they are having in-editor. I summarized the most important points below:The i...
URuntimeVirtualTextureComponent::RequestPreload not working for some edge cases
UE - Rendering ArchitectureA licensee has reached out to us to inform us that the logic for preloading at times fails to account for adaptive virtual textures when the r...
Enabling Wireframe Mode along with HDR (EyeAdaptation) Visualization crashes the Editor
UE - Graphics FeaturesIn the Viewport, enabling Wireframe Mode (ALT+2) along with HDR (EyeAdaptation) Visualization crashes the Editor. I've tested different versio...
Nanite TwoSidedSign is backwards
UE - Graphics Features - NaniteThe value of MaterialExpressionTwoSidedSign is flipped when calculating the Opacity Mask for Nanite meshes. This seems to be a regression in ...
Option "Use Mouse for Touch" does not work correctly when running the game in "Standalone" or "New Editor Window (PIE)" modes: Virtual joystick does not appear and mouse cursor is incorrectly hidden while captured.
UE - Gameplay - InputThe Editor provides option "Project Settings – Engine – Input – Mouse Properties – Advanced – Use Mouse for Touch" to allow testing virtual jo...
Sequencer events with a payload of struct containing Object do not work
UE - Anim - SequencerA structure containing Object as a parameter is misrecognized as a single Object and loses the parameter. This behavior was brought in by CL-2...
Recast: FindDistanceToWall can return incorrect results on shared edges with Excluded Nav Area
UE - AI - NavigationContext ARecastNavMesh::FindDistanceToWall can be used to find the closest 'wall' on a nav mesh, given a queried position. A wall can be:any ...