Sorry to OT your thead Bob but since Daveb seems to be reading I'd like to ask him one question:
What kind of speed boost can we expect from a full hardware T&L FS2 engine?
I think we are getting very close to the point where we can take that job on and any insight on it would be great.
Im assuming from what I've seen working on DX8 stuff that it should be very significant. Since projection, transformation, lighting and fog could all be handled in the card instead it should go lighting fast. It just seems to be a matter of seperating the rendering functions into groups like:
2D background (planets, sun etc)
2D projected in 3D (main wrap effect)
2D always facing viewer but drawn in correct order with 3D stuff. (particles, thruster glow, beam focus)
true 3D shapes (shapes)
2D foreground (HUD, etc)
And changing how they are rendered on that basis.