Unreal Engine Issues
Unreal Engine Issues
Mesh from attached USD fails to import
UE - Editor - Content Pipeline - USD - Mar 31, 2025UDN customer reported this issue: Using legacy USDImporter, the attached USD throws these ensures ensure(Primvar.Get(&UVs, Options.TimeCode)); ensure(Primvar.GetIndices(&Indices, Options.TimeCode) ...
[USD] Reimport change reference to transient
UE - Editor - Content Pipeline - Import and Export - Mar 31, 2025https://forums.unrealengine.com/t/usd-reimport-changes-referencers-to-transient/2421831 ...
Excessive RVT page updates with Nanite and ClearCoat or Cloth shading model applied
UE - Rendering Architecture - Mar 31, 2025There is an excessive number of page updates when a Nanite landscape has a runtime virtual texture material applied to it with a shading model set to ClearCoat or Cloth (instead of Default Lit). The ...
ChaosCacheManager is not recording the Observed GeometryCollections NotifyBreak states between level loading and will default to false if changed from Record to Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not recording the Observed GeometryCollections (GC) NotifyBreak states between level loading and will default to false if changed from Record to Play. AChaosCacheManager ...
ChaosCacheManager is not reproducing Collision Events the second time you Record and Play
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Collision events the second time (and onwards) we record a Geometry Collection (GC) breaking session. Particles set to track Collision Events correctly fol ...
ChaosCacheManager is not reproducing Trailing Events
UE - Simulation - Physics - Mar 28, 2025ChaosCacheManager (CCM) is not reproducing Trailing Events. Particles set to track Trailing Events correctly follow the position of the trailing event when the Geometry Collection (GC) is physically ...
When adding a MovieSceneObjectPropertyTrack and section via python, the new track is not initialized.
UE - Anim - Sequencer - Mar 28, 2025When you add a track for an Object property via python, the track does not initialize properly and the widget on the track for choosing a new object does not populate typed. This is even after setti ...
Skeleton mesh with hair strands material will lead to unnecessary draw call submissions
UE - Graphics Features - Mar 27, 2025Materials with "Used With Hair Strands" enabled will cause Skeletal Meshes to draw twice in the Base Pass. ...
Stalled cook due to PoseSearchDatabase DDC storage/retreival
UE - Anim - Gameplay - Mar 27, 2025reported via UDN: [Link Removed] ...
Raytraced lights with Source Length > 0 behave incorrectly with Megalights
UE - Graphics Features - Ray Tracing - Mar 26, 2025When Megalights is enabled, light can leak into areas that should be occluded for lights with smallish (5.0) source length and source size. [Image Removed][Image Removed] This was taken with r.Ray ...