Unreal Engine Issues
Unreal Engine Issues
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Level Sequence spending long time validating assets
UE - ACT Character - Control RigHi After migrating our animation project from 5.7 -> 5.8 we notice that some level seqeunces take much longer to save (during validation stag...
Sequencer Crash (GC Leak) in Editor
UE - ACT Character - SequencerA GC leak, similar to the one fixed by 44483919 but for Level Sequences in Level Instances rather than ones with Widgets. A Level Sequence Ac...
[Mutable] Morph Targets can be disabled in packaged builds when Mesh Streaming is enabled
UE - Runtime - MutableWhen a Mutable mesh instance is created while the actor spawns at a distance, only the low LODs are generated, and the mesh is created with no...
Bake To Control Rig produces empty keys when rig uses Import Skeleton in Construction Event and binding is a spawnable in a subsequence
Bake To Control Rig fails to key procedurally-created controls when all three of the following are true:The Control Rig creates its hierarchy ...
ShouldMarkSyncPhases causes large pose discontinuities when sync leader changes
UE - Runtime - Anim BPThe issue is caused by the way that we calculate the leader sample's Time vs the follower sample’s Time and how that calculation switches on t...
MRG - Cinematic Assembly Tokens From Metadata Return Empty When Rendering
UE - CAPT - Color Pipeline and Rendering - MRQMetadata defined on a Cinematic Assembly isn’t accessible as naming tokens when rendering with Movie Render Graph. Global naming tokens defin...
Cannot get Texture Size property from Texture Collections
UE - Rendering - Architecture - MaterialsThe following error is shown when attempting to use the Texture Size of a Texture Collection texture object: Texture size only available for ...
Possible shader preload deadlock when using Zen streaming
UE - Rendering - ArchitectureThe deadlock happens when enough shader preload are launch in parallel on a slower IO backend (like zen). When that happens, the preload start...
Incorrect rendering result on some geometry and materials in grouped components in SKP imports
TM - InteroperabilityReported in SF [Link Removed] In Twinmotion 2026.1, when importing certain SKP files with grouped components, materials may render incorrectl...
Brick Pattern Artifact in Volumetric Clouds
UE - Rendering - FeaturesA licensee has reported seeing a repeating brick-like pattern in volumetric clouds when they overlap with very distant geometry (or at the tra...