Unreal Engine Issues
Unreal Engine Issues
Check the status of an issue or Search for an existing issue.
SKP import - Materials missing and incorrect when using Collapse all
TM - InteroperabilityReported in SF [Link Removed] When importing a .skp model into Twinmotion 2026.2 Preview as Geoemtry, using the Collapse all mode will cause ...
Mutable Chaos Cloth breaks when culling mesh affects mesh sections with cloth
UE - Runtime - MutableEncountering an issue since we updated to UE5.8 where characters whose cloth mesh sections have vertices culled will cause mesh degradation in...
GPU Scene reserved resources can break Niagara mesh preview rendering
UE - Rendering - Architecture - NiagaraWhen a Niagara emitter has multiple Mesh Renderers and each renderer draws a different subset of particles (via Renderer Visibility), all rend...
Particle Random Value is the same for all particles with a Niagara Mesh Renderer
UE - Rendering - Architecture - NiagaraA material using the Particle Random Value node returns the same value for every particle drawn by a Niagara Mesh Renderer. Particle transform...
[Niagara][5.8] Data Channel Read and Write register with an identical type hash when fx.Niagara.DataChannels.Enabled is set from ini, hitting checkf in FNiagaraTypeRegistry::RegisterTypeInternal
UE - Rendering - Architecture - NiagaraAffects: 5.8 (verified on Release-5.8), Windows, EditorSummary Adding fx.Niagara.DataChannels.Enabled=true to an ini file makes the Niagara e...
Scrubbing the timeline in Sequencer can hang the editor when operating on constrained actors with complex control rigs
UE - ACT Character - Anim in EngineThe issue is caused by UAnimDetailsProxyManager::ForceUpdateProxyValue triggering evaluation of constraints that are attached to control rigs....
Chaos Mover crash in standalone editor client
UE - Runtime - CharacterWhen using the Chaos Mover with resimulation enabled, standalone editor processes running as a client will crash around 80% of the time upon s...
Unexpected offset when using attach tracks with scene root components
UE - ACT Character - SequencerWe noticed an inconsistency when using attach tracks, depending on whether or not the parent actor has a default scene root. This creates an u...
ObjectScale node in the material editor does not work with decals
UE - Rendering - ArchitectureThe ObjectScale node does not output the correct values in the material editor. This method works to tile images with a Surface Material Domai...
SceneCaptureComponent2D destroys shared Lumen Radiosity atlases every frame, breaking temporal accumulation in the main view
UE - Rendering - Features - LumenA USceneCaptureComponent2D with bCaptureEveryFrame = true and default post process settings causes FLumenSceneData::IndirectLightingAtlas and ...