Sorry for the confusion. Neither actually. I am only looking to mill the surface that is represented in the STL (image from Meshmixer attached, notice there is no vertical wall outside the shape, just a quilt in space), without any other surface removal or side cuts. Based on the STL shape, it would just end up as a pocket like it is, but Estlcam seems to want to add the perimeter cut as well. It’s hard to tell but the perimeter seems to be a consistent depth all around. (the arrows in the second image point to the perimeter cut (more like a slot) that should not be there). In other words, what I’m trying to get to is a tool path where the bit doesn’t ever go below the STL surface, even outside the boundary.
