If I understand you correctly you are just elaborating on the bit I excerpted from the linked thread? This is out of my depth but it is interesting. It seems povray would have to drastically change how it works to really benefit from GPUs since in povray a sphere is an object related to pi and not a series of triangles which are arranged into the shape of a sphere where each triangle can be easily paralleled on a GPU since they are all handled the same way?

Or did I not understand and you are saying povray's performance could actually be improved by modern GPUs without reworking how it deals with its primatives?