If you are a developer, please build MegaGlest on your own and get in touch to contribute (or post your patches on the forums).
512 by 512(Largest recommended)
I think that there is nothing to recommend about a 512 x 512. That makes people's games run slow especially in battles.
Ummm, I think that a 32 by 512 is pretty lame. I mean other than for scenarios, why?