@bigfoot
many thanks for explanation and nice plans.
I like to contribute to the bounty if it will be.

And I have some questions. I am not developer or expert on computer graphics, but want to ask, what part of graphics cards hardware this future MorphOS OpenGL implementation utilize?

R200 - R500 have in HW spec (techpowerup.com):
Pixel Shaders
Vertex Shaders
TMUs (texture mapping units)
ROPs (render output units)

R600, Evergreen, Northern Island have:
Cores (=shaders?)
TMUs
ROPs

So what is most important for TinyGL/OpenGL speed in MorphOS? Can MorphOS utilize all Shaders or cores?
Please, in short is enough. I make often a benchmarking and it helps a lot.