Unreal Engine Issues
Unreal Engine Issues
Nanite mesh polygons disappearing when using masked opacity with vertex color in 5.4
UE - Rendering - 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 ...
ResavePackages fixredirects commandlet crashes Assertion failed: FLinkerLoad::FindExistingLinkerForPackage(Package)
UE - Engine Scaling - Streaming - OFPA - Jul 24, 2024check(!bPostTickComponentUpdate) fails triggered by UNiagaraComponent::CreateRenderState_Concurrent() and StaticMeshCompilingManager::FinishCompilation()
UE - Rendering - Architecture - Niagara - Jul 23, 2024Reported alongside UE-220009 Context: Some ActorComponents can schedule end-of-frame work which UWorld executes later in the frame in UWorld::SendAllEndOfFrameUpdates(). By-design it appears that i ...
check(!bPostTickComponentUpdate) fails triggered by ~FStaticMeshComponentBulkReregisterContext() and FD3D12DynamicRHI::ProcessInterruptQueueUntil()
UE - Framework - 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 - Rendering - 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 ...
Chaos Cache : Event tracks are not saved second or subsequent geometry collection recordings
UE - Runtime - Deformable - Jul 23, 2024After the second recording time, the event listener registration in FGeometryCollectionCacheAdapter::InitializeForRecord is skipped. Here is a workaround :// We only need to register event handlers ...
Cannot instantiate an InstancedStaticMesh component with ConstructionScript
UE - Rendering - 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 ...
Assertion when trying to break LevelInstanceActor when its level isn't current
UE - Engine Scaling - Streaming - Level Instances - Jul 19, 2024JumpForce 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. ...