anyone know of a way to do normalmapping in maya? i'm looking to try out modding the far cry demo, which utilizes normalmaps, but i don't know how to go about making normalmaps. actually i know next to nothing about normalmaps so really any information at all about them would be cool... how to create them, what they are (are they just variations of textures? if so, is it done in photoshop and not maya?), anything.

thanks!