   CSG Subtraction/Addition
  any one know where i could find some tutorials on this topictnx in advance 
  try google. ;  some one plz at least tell me if im on the right tracknow what i think it is that i create planes using the polygons from the subtracting object to split the main object into multiple objects which would leave me with multiple objects in the form of the main object minus the subtracting object.is this right??if not please point me in the right direction.thank you very much ;  You mean in 3D, right? Because 2D is a totally different subject.   ---shurcooL`;http://www.cfxweb.net/~aggrav8d/tutorials/csg.html - This is a tutorial on doing CSG in 3D.However, the above method is flawed (I know; I coded a demo and tested it). It retains the same object, only cutting polygons, which it does rather inefficently. You might want to use the CSG method used in q3radiant and 3DS Max, which uses planes to divide   the object being split into many smaller objects. This is much more effectove, as it saves polygons...   Windows 95/NT - 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company that can''t stand 1 bit of competition. ;  thanks 