There wasn't as much in the way of texturing to worry about in Jak 2 (or any of the other five games of its spawn) compared to modern games. Texturing usage in the game is incredibly low-key. Often, it's low resolution, too, like with ground textures which fill the screen most predominantly that look like nothing more than green and brown blotches of indistinguishable detail... meant to convey an earthy look.