EQ Engine Specs

[Chewybunny]

I've noticed several people messing with textures. So I have some questions with anyone familiar with the EQ engine:
What are it's texture and material limitations? How big can it handle textures? What about models and geometry? I'm curious because it would be neat to try to make a package of more "realistic" or "modern" textures if it's allowable.

[Jimjam]

32 bit Client gets sad approaching 4GB.