Here is a short list of criteria that affect the manufacture of draft angles:
A tool of the exact size radius is not required to finish the feature, but without the exact size, the pass generally leaves a scallop.
The finish operation with a tapered tool only goes down to the intersection of the straight side and the bottom radius.
The rough operations are generated unless the scallop height is set to 0.
Scallops are never at the top edge of the feature except when cut with flat-end tools.