Im building a game in 3D ( UnDelphiX )....
Now im a little stuck building a 3D editor.... I can make rooms etc... My

My 1st question
If I make a room, and I create an other room next to it (2 room hit achtother), I need to cut some polygons, so you can see the other room....
Has anyone got a method for it
(ist something like the boolean-function in 3D max I mean)

my 2nd question : how to put decals onto walls ...

:?: :?: :?: