Hoi Hans, Emmanuel,
After having some sleep i think i figured out the reason why my request wouldn't work that easy as i hoped.
here's my theory (have fun):
it's like this: sh3d does actually not cut (substract, boolean) the windows into the wall. it "simply" splits the wall temporarily into 3 pieces, left/middle/right and places the window/door into the middle one.
that's why i couldnot "cut" round holes - sh3d does not cut at all.
so, as a result, every wall is being exported as 2 walls(1 for each side), splitted into at least 5(10) parts for left/middle up/window/middle down/right (+ the same for other side).
Coping with this amount of objects per wall should not cause any fun
when you take dozens of window into acount...anyway, just uploaded something new to the gallery.
greets
macfrog
