I came back to a previous project of mine using trimesh recently, and boolean differences where not working anymore, returning an empty mesh. After some investigating, I found out the issue was ...

4.2 LTS https://docs.blender.org/manual/en/4.2/addons/import_export/scene_gltf2.html 4.4 https://docs.blender.org/manual/en/4.4/addons/import_export/scene_gltf2.html ...