LOL! Damn that Intel floating point math! Although I don't think that they have had a prob with is since the 486 :) Unfortionately this is a bug in Carrara :( I'm sure that someone will chime in with a work around for it here in a bit...but if at all possible, avoid booleans at any cost in Carrara...Hey, at least its not crashing when you use them :) I can already see kaom's reply to this one...get ready for the Rhino pitch :) ... he's awesome with it! Jared