Most concave surfaces will self-intersect when extruded, what do you expect to happen? What are you trying to accomplish?
To solve it you’d have to use advanced techniques like isocontouring a distance function.
Most concave surfaces will self-intersect when extruded, what do you expect to happen? What are you trying to accomplish?
To solve it you’d have to use advanced techniques like isocontouring a distance function.