I've run into this problem from time to time and have come up with a work-around that is reasonably satisfactory but would sure like to know why this happens.  It appears that this surface (and some others I've dealt with) offsets in two directions.  When offsetting I used the "loose-on" variable which appears to have more or less saved the integrity of the partial chine that was created using the ORCA plug-in.  It is in the region of the forefoot that I've experienced a sort of reverse offset…See More