Unreal Engine Issues
Unreal Engine Issues
Mirror operation on Physics Asset produces wrong results for constraints, including flipped axes
UE - Simulation - Physics - Feb 7, 2025The Physics Asset Editor has a "mirror" feature that allows physics bodies and constraints to be mirrored from one side of a skeleton to the other. If this operation worked correctly, it could save ...
Deleting transient actor marks level dirty
UE - World Creation - Worldbuilding Tools - Feb 6, 2025The licensee has noticed that the deletion of a transient actor still marks the scene as dirty and asks it to be saved. Checking the source it was noted that the transient flag is not verified on de ...
[Interchange][FBX] Import model with custom collision prevents socket to be imported
UE - Editor - Content Pipeline - Import and Export - Feb 5, 2025I would like parity with legacy: 1) only one material 2) socket to be imported Box_Socket file imports same in legacy and interchange: it is just box and socket without collision. ...
COND_InitialOnly property not written to first replay checkpoint after being changed
UE - Networking - Feb 5, 2025When recording a checkpoint, it is treated as an initial replication, as all the changed properties since the channel was opened need to be recorded. This normally results in any initial only proper ...
Foot Placement: Checks should be ensures
UE - Anim - Gameplay - Feb 5, 2025As per the title, a cosmetic anim node should not be crashing an entire game. At worst these should be ensures. Its experimental, but its important they're removed before the experimental flag is re ...
Translucent materials in the PostMotionBlur pass can cause a flickering viewport artefact when using TAA
UE - Graphics Features - Feb 5, 2025There appears to be a bug relating to rendering multiple windows that can trigger under unknown circumstances. It has been reported on rectangle lights in the forums and on PostMotionBlur materials ...
Static Meshes that are reimported with less materials can lead to map check errors on instances that had overriden materials that require manual cleanup
UE - Rendering Architecture - Feb 5, 2025StaticMeshActors placed in the world can override the default materials of a static mesh. If the static mesh is then reimported with less materials, the actors maintain references to unused material ...
SDF/Mesh Cards do not follow material settings applied on static meshes
TM - Core - Feb 4, 2025Building SDF and Mesh Cards require material properties (2 sided and blend mode) applied on Static Mesh to be known at Static Mesh build time. If not, it may leads to rendering artifacts: Reflectio ...
FLevelInstanceActorGuid::GetGuid issue in Multiplayer
UE - World Creation - Worldbuilding Tools - Level Instances - Feb 3, 2025I am doing some runtime manipulation of data layers and I am running into a check failure due to a zero guid in FLevelInstanceActorGuid::GetGuid during multiplayer testing. When I debug FLevelInsta ...
Spline mesh crashing in FRayTracingDynamicGeometryCollection::AddDynamicMeshBatchForGeometryUpdate
UE - Graphics Features - Ray Tracing - Jan 31, 2025A crash occurs when using ray tracing with spline meshes preceded by the following ensure : Ensure condition failed: NumCPUVertices <= VertexBufferNumElements File: Engine\Source\Runtime\Renderer\ ...