Hmmm, I dove into the way the Render method works, and finally grasped the idea Took a while...
Although it's excellently thought out for effects that alter the existing image, or those effects that draw a new image based on some translation of X and Y coordinates, it seems that the current method can't be used (efficiently) for the stuff I'm trying with my Orb Generator. My calculations are not based on X or Y coordinates, just on the size of the surface or users selection.
Anyway, I did find a way to fix this, although I'm not sure if this is how it should be done. I've created a static B