Killzone 2 has poor texture work. Low res textures all over the place. This seems to be a problem with almost every major PS3 exclusive (Resistance, Warhawk, Motorstorm, MGS4, KZ2, etc). The only one that has really nice textures is Uncharted. Naughty Dog is like their best technical dev so that's expected. The rest of the games fail to impress with their textures. A couple of the worlds in Ratchet have nice textures too (Iris and Meridian City).