The floating theory seems like total speculation to explain the alleged lack of distortion. I’ve never seen anyone with a face like the shroud face.
Watch the documentary if you can, the physicists give a better explaination than the clumsy one I can give.
After being beaten and abused by Roman guards,then having a crown of thorns ( and these were particularly nasty large ones) shoved down on your skull, and being crucified my guess is that your face wouldn’t look to good either