I've spent way to long trying to figure this out....
I have a complex shape.
I want to make a mold cavity out of it.
But if I extrude a box around it, I can't cut it so that the complex shape is removed. The cut Boolean is very restrictive.
Basically - I can't figure out how to make a mold cavity in Inventor.
Any suggestions? I'm sure this will be easy once someone lets me in on the secret.