I am running into one prob: I need to substrat one obj=B from multi objs, so A1-B=A1', A2-B=A2'.....looks like no way. I don't want to attatch all A1,A2,A3... into one epoly then Sub B, this will change each A obj's color into same color and after sub I have to detatch each element into obj. the only way has to be using Maxscript? BTW, any way to do proboolean by "multi to multi"? I know so far MAx can do "one to multi".