What's wrong with UV unwrapping in Substance Painter?

Question

Blender

made a UV unwrap in blender, everything looks good, but when importing into a substance (auto unwrap is turned off in the substance settings), a cube unwrap appears on the "Metal" material, although there are no cubes in the scene, and the unwrap is done...

Answer 1

Perhaps you have some hidden element in your scene.
Try to select only the necessary elements during export and check the selection only checkbox.