I'm sorry Rednova, you need more than just a faster and more powerful compiler. You need to know enough matrix math (linear algebra) to be able to calculate the reflections and refractions of every single light wave whose resultant ends up projecting out of a plane (your screen, for example).
With your art background, I doubt you'd be able to handle it. I have had linear algebra in college and barely made it through with a C. I know I can't handle it and I do know C programming quite well.
Perhaps your time would be better spent learning how to program for OpenGL 3d applications on your PC so that when Mesa comes out for AmigaOS 4 you can use that effectively.
Also, one of the best free applications for 3d modelling is called Blender. It's difficult to use but has already been ported to MorphOS and AmigaOS 4. If you learn to program in Python (which is much easier than C, by the way) you can modify it for your uses.
Good luck with your programming projects,
--Sam