Unreal Engine Issues
Unreal Engine Issues
Importing through Python fails
UE - Editor - Content Pipeline - Import and Export - Feb 20, 2019Version 4.21:The script result in popping the Alembic Import windows instead of a silent importThe provided options are ignored by the importer. Version 4.22: Results in the provided callstack wi ...
Some .tmi files from previous versions cannot be used in TM2025.2
TM - Core - Sep 30, 2025Some .tmi files appear, while others don’t.The customer mainly uses Blender and SketchUp.On the customer side, even the TM asset “Metal workout desk DCL” has the same issue.On my (Syuya Mukai) side, I ...
Re-Importing a Static Mesh Removes All Sockets
Tools - Mar 9, 2017Re-importing a static mesh results in all currently applied sockets being removed from the static mesh in the Editor. Workaround: Setting the sockets up in the Native 3D editing software followin ...
Virtual Bone effect is lost after re-importing mesh
OLD - Anim - Dec 31, 2018After setting up a Virtual Bone on the skeleton and having it drive a Skeletal Control Node in an Animation Blueprint. Reimporting the skeletal mesh will cause the setup in the Anim BP to revert bac ...
OBJ import - Auto Triangulation - Error: No polygon were found on mesh ''
UE - Editor - Content Pipeline - Import and Export - Nov 23, 2019"When translating some geographic data into a .OBJ, and importing into UE4. More than 165 of the meshes work. Some, i am having a hard time with. I've attached an example. AUT-mesh.obj is one of the ...
Skeletal Mesh breaks perspective view in Physics Asset Tool.
UE - Simulation - Physics - Feb 19, 2016When importing licensee's provided asset the Physics Asset generated will completely break the Perspective View in PhAT. The other orthographic views will work as intended though. The licensee has ...
Unable to remove StaticMesh LODs in editor
Tools - Jan 18, 2016Static Mesh LODs cannot be removed after import from the Static Mesh Editor unless you have Simplygon installed. Hovering over the tooltip for "Number of LODs" indicates this as well with "Auto mesh ...
Key precision problems on some short animations
Tools - Apr 5, 2016Please see attached UE4_anim_interp_bug.fbx for a second example. This works as expected in 4.7 and 4.8 I've got a couple different users reporting this now. I suspected animation compression to ...
Crash Importing Skeletal Mesh LODs with a lot of morph targets
OLD - Anim - May 18, 2016Crash Importing Skeletal Mesh LODs with a lot of morph targets Error message: Assertion failed: (Index >= 0) & (Index < ArrayNum) [Link Removed] [Line: 785] Array index out of bounds: 2 from an ar ...
Morph target normals not correctly applied when imported as LOD 0
UE - Editor - Content Pipeline - FBX - Nov 27, 2025This is a regression since 5.5 with skeletal meshes where morph target normal/tangent deformation only works when a mesh is imported as a LOD of an existing skeletal mesh, but not when imported as L ...