Unreal Engine Issues

Modifiers do not behave as expected when adding conflicting mappings of different priorities

World Partition - Deleted actors can become unloaded prior to saving

In world partition levels, deleted actors can become unexpectedly unloaded prior to saving, causing loss of work. Specifically, this issue occurs after the undo history has been cleared (either manu ...

UPoseAsset::SetBasePoseName() always sets INDEX_NONE

UPoseAsset::SetBasePoseName() does not correctly set the BasePoseIndex when a valid pose name is provided. Regardless of input, the pose defaults back to ReferencePose. Upon inspection of the implem ...

Nanite TwoSidedSign is backwards

The value of MaterialExpressionTwoSidedSign is flipped when calculating the Opacity Mask for Nanite meshes. This seems to be a regression in 5.5. ...

XR - Volumetric Clouds - VM Clouds appear overtop of meshes in the right-eye

When the user changes the Volumetric Render Target Mode, the Volumetric clouds in a scene will render in front of Static Meshes in the Right-Eye. ...

[CrashReport][Crash] UnrealEditor-Core!IMemoryReadStream::CopyTo()

Intermittent crash in virtual texture transcode. Usually mempy from nullptr but also occasionally we see the same callstack with memcpy to random location. ...

Investigate PythonScriptPlugin module load order for preload module

init_unreal.py loads with errors from ML deformer module which has dependencies that are not loaded in -game runs of the editor

SKP import - Mirrored groups will display with the default material in Keep Hierarchy imports

Reported in SF [Link Removed] SketchUp models containing grouped elements that are mirrored will incorrectly display these elements with the default material when imported using the Keep Hierarchy ...

Crash when attempting to change the parent of a material instance constant through editor scripting

The built-in class "UMaterialEditingLibrary" provides various editor scripting functions related to creating and editing materials and material instances. One of these functions, UMaterialEditingLib ...