Hi bigseb - MoI does not have a backface display command yet, but that is something that I do want to add in the future.

There is a function to flip surfaces in MoI though, some info on that here:
http://moi3d.com/2.0/docs/moi_command_reference10.htm#flip

I don't understand about the part about flipping them in Powermill giving shoddy results - doesn't flipping it in Powermill produce a flipped surface the same as if you were to flip it in MoI? Could you maybe describe why flipping it in Powermill is different than flipping it in MoI or Rhino?

- Michael