Unreal Engine Issues
Unreal Engine Issues
Duplicating SkeletalMesh in packaged game causes crash
UE - Rendering - Graphics Features - Nanite - Mar 11, 2025This code worked until UE5.4. NaniteResource added in 5.5 causes this issue. ...
Crash when creating a Material Instance of a Material with Material Attribute Layers expression connected to a Substrate Convert Material Attributes.
UE - Rendering - Architecture - Materials - Mar 8, 2025A UDN user has reported this crash [Link Removed] The user also reports that the editor will crash:If the material is loaded while in PIE.If the material is used in a level (crash occurs when the l ...
Inconsistent Behavior of TFieldPath and nullptr comparison
UE - CoreTech - UObject - Mar 7, 2025Commit 6448c6f (https://github.com/EpicGames/UnrealEngine/commit/6448c6f6d1de1e9fac9614248e06ba06b837814d) introduced inconsistent behavior for TFieldPath and nullptr comparison, depending on constn ...
FRayTracingGeometryManager::Tick() called twice during a single frame
UE - Rendering - Graphics Features - Ray Tracing - Mar 5, 2025UDN licensee Prophecy Games has encountered an issue in which the RaytracingGeometry::Tick() function is called twice during a single frame. This causes an assert to trigger, which blocks them from ...
When running in the Editor, actor owning a UCameraTestComponent that sets DesiredView.Rotation Pitch below -90 or over 90 will attach to the Editor Camera as if it was being piloted
UE - Gameplay - Gameplay Cameras - Feb 27, 2025When running in the Editor, actor owning a UCameraTestComponent that sets DesiredView.Rotation Pitch below -90 or over 90 will attach to the Editor Camera as if it was being piloted. The licensee re ...
World Position is incorrect when used to control the opacity mask in a nanite spline mesh
UE - Rendering - Graphics Features - Feb 20, 2025When calculating the opacity mask, Nanite spline meshes do not have the correct World Position in the Material. This leads to visual artifacts when the mask relies on the world position. ...
AfterMotionBlur Translucent Material With Local Exposure Enabled Causing Artifacts
UE - Rendering - Graphics Features - Feb 20, 2025When TSR is enabled, translucent materials using the AfterMotionBlur translucency pass cause visual artifacts when local exposure is active. The artifacting is believed to occur because the local ex ...
Wrong motion vectors with Nanite ISM when using ActorPosition material node
UE - Rendering - Graphics Features - Feb 17, 2025Here is the file for the repro project in Google Docs, due to the file size limit: [Link Removed] ...
Cards for a Groom asset do not update normals during simulation
UE - Rendering - Graphics Features - Feb 13, 2025When a groom is allowed to simulate, only the strand representation computes correct world normals for the new hair strand positions. This is especially noticeable when the groom is inverted as grav ...
Incorrect mesh deformation when Max World Position Offset Displacement used
UE - Graphics Features - Nanite - Feb 12, 2025When Vertex Animated Texture is used to animate a mesh with World Position Offset, often the Max World Position Offset Displacement Material setting must be increased or the Bounds Scale increased, ...