I’m pretty sure the normals are inverted. I’m not certain this will fix it, but please try this:
- Open your model in Blender.
- In Object Mode, Press Ctrl+A.
- Select
Scale. - In Edit Mode, select all and recalculate the normals.
- Export to Unreal Engine and see if it’s fixed.
In Blender, if the model has been scaled negatively in Object mode, the normals will be inverted. By telling it to apply scale, you’re telling Blender that it should set the Scale to 1 while preserving your edits.
Hope this helps!