Originally Posted by
mtylerfl
The litho view only appears in the left window when doing rotary. That won't give you a correct preview, since the material of the rotary stock is assumed to be solid for the entire diameter. (Actually, half the diameter in the unwrapped view.)
What I do is create a second "flat litho" file and set the material thickness to match the wall thickness of the pvc pipe. That way, you can experiment with your depth settings and get an accurate preview in the "flat mode". Once you're happy, simply set the same depth of carve for your rotary file and carve it! :)