If you download just one GTA 5 mod, you might want it to be Josh Romito's "The Pinnacle of V - World Enhancement Project." Not only is it obscenely pretty (as evidenced by the trailer below), but it also overhauls many of the game's physics systems and combat. Bullets take more time to reach their targets, vehicles handle more realistically, certain materials can be shot through or broken apart, and melee combat is now faster.
But really, the highlight of The Pinnacle of V is the super-saturated, 4K textured, over-glossed cars. It's not photorealism - too colorful and reflective to call it that. No, I'd say this is commercial realism; the type of imagery you see in a car commercial that makes you drool with desire over a freshly waxed coupe. On a completely unrelated note, I've suddenly got a strong desire to visit my local dealership just so I can "oo" and "ah" at the lovely lovelies.
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