Hi people! This is my first post here for help so please be gentle. *grin* Umm, I am at a loss to explain all the particle artifacts left behind after using boolean operations to cut pieces out of the ampitheatre pictured above. The steps are all positive terrains (solid) and have been cut by a negative cube and a negative stone, and as you can see the cuts are certainly not clean and is leaving a lot of minute particles behind (strangely enough with experimentation the stone seems to cut a lot more solidly than the cube). Another strange occurance is you'll notice the shadow of the theatre is still cast onto the ground despite the part casting the shadow [supposed to be] being missing. Is anybody able to explain this to me, and a possible method of performing booleans on these terrains without leaving any of the bits and pieces?? Any help would be tremendously appreciated. Many Regards, Bhanshee