Need Help! Using Stock Model/Air cutting

Hi all,

I was wondering if some of the experts here can shed some light on the following: Is it possible to use a stock model, which is imported into Mastercam as an STL, in order to have mastercam take it into consideration when creating tool paths???

Let me explain further: Yes, we can import a model as an STL so that we can see it, and also see how the tool paths will cut it in the simulation, but does mastercam TAKE THIS MODEL INTO CONSIDERATION when creating the tool paths??? Reason why I say this, is that no matter what tool path I try, Mastercam will always make its own decision as to where the stock is, and then create toolpaths that have a lot of air cutting...ignoring the stock model that was imported.....in other words, it uses a stock model for verification, but not when it creates the tool paths, so that it can create them more efficiently, (if material is not there.....). Is there a way to do this ( I would think that Mastercam is not that dumb....) but I am loosing hope....

Can someone shed some light on this? Hopefully I have asked the question correctly....