Hi Archlite, I use the spline modeler for super exact control of shapes. When creating the objects above, I draw the Cross Section paths in Illustrator. I then also draw the Sweep Path. So for each 3-d shape, I import 2 Illustrator files. I can get precise mathmatical control over paths in a way that I can't with Carrara's drawing tools. If you go to the Free Stuff section and dowload the Wheel/torus file you can see that I 'freehand' drew the Rim and Tire portions of the file but the tread had to be perfect or you would notice it in the image. That was a job for Illustrator. Then I could import the path. Mark