When UT loads a specific level, does it only load the texture pack for that particualr level into RAM, or are all textures kind of loaded "just in case"? What I'm really trying to find out is this: when making a map, is it advisable to limit yourself to textures from one pack only, to cut down on memory use? or is it ok to mix textures from different packs? or is it a good idea to create a new pack with just those textures in it that are actually used in the level?