Emmanuel:

Thank you VERY VERY much for this new feature. The longer the wait, the sweeter the taste.

It works under Ubuntu as well. However... it seems a bit buggy.
The old bug is back: when I start v2.6 and try to load the file you provided, the program crashes immediately. Every time. I have to insert an object in the first instance of SH3D before I can open the file as a second instance.

The other problem has something to do with refreshing the screen. When I drag an inserted door out of the wall, the door disappears and only the glass window in the door remains visible. When I do a right-click and (without selecting anything) a left-click, the screen refreshes correctly.

Hans