Unreal Engine Issues
Unreal Engine Issues
Nanite mesh polygons disappearing when using masked opacity with vertex color in 5.4
UE - Graphics Features - Nanite - Jul 24, 2024In 5.4.3, a nanite enabled mesh with a material that takes its vertex color (R) and uses it as the opacity mask output in a masked blend mode material, causes the mesh to have disappearing polygons ...
Mismatch of light position and PerObjectProjectedShadows
UE - Graphics Features - Jul 23, 2024Per-Object shadows cast by a stationary point light do not appear in the correct place on movable geometry. ...
check(!bPostTickComponentUpdate) fails triggered by UNiagaraComponent::CreateRenderState_Concurrent() and StaticMeshCompilingManager::FinishCompilation()
UE - Niagara - Rendering - Jul 23, 2024Reported alongside [Link Removed] Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears t ...
check(!bPostTickComponentUpdate) fails triggered by ~FStaticMeshComponentBulkReregisterContext() and FD3D12DynamicRHI::ProcessInterruptQueueUntil()
UE - Gameplay - Components - Jul 23, 2024Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears that it's not allowed to schedule mo ...
Light Leaking With Raytraced Shadows On Lights With Non-Zero Source Length
UE - Graphics Features - Ray Tracing - Jul 23, 2024Light sources which have the source length attribute set to a value greater than zero seem to be leaking light through occluding geometry (see the image below and repro project). Moving it away from ...
Cannot instantiate an InstancedStaticMesh component with ConstructionScript
UE - Graphics Features - Jul 21, 2024Starting with Unreal Engine 5.4, the logic for adding ISM instances by adding ISM components in the Construction Script (like below) has failed. [Image Removed] This issue accidentally was introd ...
JumpForce replicated ability task not always cleaned up properly
UE - Gameplay - Gameplay Ability System - Jul 19, 2024See [Link Removed] for original report. UAbilityTask_ApplyRootMotionJumpForce has a slightly different flow than other Root Motion Source ability tasks. It is the only one that allows EndTask to b ...
Landscape Layer Painting issues when painting near the edge of delete Landscape Proxies.
UE - Graphics Tools - Terrain - Jul 19, 2024It appears that the landscape painting tool is not correctly taking into account deleted landscape sections, resulting in artifacts inside of the weight textures. ...
(BUG) Sequencer Root motion breaks down when using SwapRootWithActor, translation track and transform origin actor
UE - Anim - Anim in Engine - Jul 19, 2024When "Sequencer.ThreadedEvaluation.AllocationThreshold 8" is initiated, characters in a level sequence that have “Swap Root Bone Actor” activated on their animation will begin to slide very fast acr ...
Regression - Inherited component properties on actor instances of derived blueprints are silently reset to defaults when the blueprint is compiled, causing data loss
UE - Gameplay - Jul 19, 2024In certain circumstances, when a derived blueprint is compiled, all properties from its inherited components can be silently reset to defaults on instances placed on the current level. This results ...