Unreal Engine Issues
Unreal Engine Issues
Incorrect first frame in video exported while media plays in Viewport
TM - Rendering - Oct 16, 2025GeneSplicerModule has linking errors in a Development target
MetaHuman - Oct 16, 2025The FArchiveMemoryStream class is defined in GeneSplicerModule and RigLogicModule. This generate linker error as this doesn't respect the "One Definition Rule" 1>Module.GeneSplicerModule.cpp.ob ...
The GeneSplicerModule depends on 2 developer modules which prevents its use in Shipping exe.
MetaHuman - Oct 16, 2025The GeneSplicerModule depends on the 'SkeletalMeshUtilitiesCommon' and the 'MessageLog' modules which are Developer modules. Those cannot be used in a Shipping target. UBT will fail the compilation ...
Mutable - morph does not work for a skinned mesh with more than one uv channel
UE - Anim - Mutable - Oct 16, 2025The morph functionality fails to change when the skinned mesh contains more than one UV channel in a Customizable Object. ...
Right eye looks worse than left with Deferred
UE - Platform - XR - Oct 16, 2025[Interchange] FBX - Front Facing X-Axis and Flipped Bone Orientation During Animation
UE - Editor - Content Pipeline - Import and Export - Oct 15, 2025Actors attached to a skeleton imported through a FBX file with the Front Facing X-Axis option enabled are flipped when the skeleton is animated. ...
Intermittent Content is Missing from Cook errors for objects with Niagara packages
UE - Niagara - Oct 15, 2025Intermittently when cooking large licensee projects, an error is reported at the end of the cook:LogCook: Error: Content is missing from cook. Source package referenced an object in target package b ...
Light Leak Issue in Modular Buildings (Lumen HZBTraversal)
UE - Graphics Features - Lumen - Oct 14, 2025Starting in Unreal Engine 5.6, disabling "r.Lumen.ScreenProbeGather.ScreenTraces.HZBTraversal" can lead to light leaking between adjacent or overlapping meshes. Also tested on Release-5.6, CL: 4523 ...
Material Instance Platform Stats don't update when Material Layer parameters are changed
UE - Rendering Architecture - Materials - Oct 14, 2025The instruction count appears to update properly if the whole asset editor is closed and reopened. ...
Extend Worldpartition Editor Grid Widget
UE - World Creation - Worldbuilding Tools - World Partition - Oct 14, 2025Licensees are looking into ways of adding visualizations to the editor worldpartition grid widget. In one example case, just adding some lines to show which parts of the wp minimap belong to which s ...