Unreal Engine Issues

[AI] WP Dynamic navmesh fails to rebuild tiles with actors that are loaded but not part of the base navmesh.

WP dynamic navmesh does not properly react to actors or navigation modifiers that are loaded in areas that the navmesh has not yet streamed into. Although the actors/modifiers are not part of the ba ...

Packed Level Actors will create ISMs with inverted normals when a portion of static meshes have negative scales. This is apparent with two-sided materials.

Packed level actors will create ISM instances with inverted normals when the selection of meshes used to create the packed level actor contains a subset of meshes with negative scales. This is the ...

Wrong motion vectors with Nanite ISM when using ActorPosition material node

Here is the file for the repro project in Google Docs, due to the file size limit: [Link Removed] ...

Linear interpolation occurs on constant tangent curve partially

When using UV scrolling for a flipbook-like animation in Animation Sequence, creating keys with "Constant Tangent" settings on Curve Editor does not result in an instantaneous change to the specifie ...

Retargeting montages breaks the referenced animation's in Pose Search Databases

If users retarget a montage that is referenced by a pose search database, the reference in the PSD is wrongly changed to reference the new montage.  This means any users that use montages with motio ...

IK Retarget editor's asset browser doesn't list all asset types

Certain asset types that are displayed in the Retarget Animation window are not displayed within the asset browser in the IK Retarget editor ...

Additives using Frame From This Animation as the Base Pose Type fail to retarget correctly

Additive animations that use a frame from their own sequence as a base pose are initially broken when retargeted.  Users have to refresh the properties that select the base pose in order to fix the ...

Curves do not scale with modified animation length at reimporting animation with new interchange importer

Cards for a Groom asset do not update normals during simulation

When 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 ...

Duplicating many Actors at once in a Level Instance while in Level Instance Edit will result in a jumbled mess of Actors on the Persistent Level

Duplicating many Actors at once in a Level Instance while in Level Instance Edit will result in a jumbled mess of Actors on the Persistent Level. The licensee has encountered this in Unreal 5.4 and ...