Yes I created an hinge-right version of the door. But the problem is, that you can only specify to use it on open doors. Closed door always have the same model.
I've searched for "Sand invisible" and "FallingSand", but couldn't find this report. Maybe i just oversaw it.
Ok. tintindex: 0 worked. I've tried tintindex: 1 before, which didn't work. The wiki says, that the number doesn't change anything, but it does. Thanks. Report can be closed.