Hi. I am trying to figure out the best way to add geometry to the inside of scans. I don't want to reverse-engineer the outer surfaces because I need to keep them. But I want to add holes, passageways, shell the surface in a CAD type application. The use is for creating antique car parts, like an old carburetor. The surface uniqueness must remain, but the internals must be accurate. Since the scans are only able to get the edge of the holes, I need to add the CAD elements to finish the job. I know a CMM with Polyworks or similar would be the ideal setup, but $$$. I can purchase Spaceclaim and use their STL prep for AM module, but that's $$. I was hoping to find something more like $ or free.
Anybody know of anything?