Originally posted by smuttysy
I'd say it's photoshopped, mostly because there are no reflections, shadows or any other enviromental effects cast on the car in any of the pictures. I seriously doubt that if it was an actual in-game chip they would actually override the game's texturing engine enough to remove these effects, after all even matt black goes "fluffy" at night in the crazy world of GT5.
It's not photoshopped

I can prove it online.
It changes to different color everytime you join track online.
Can't share the code because I didn't find it. PM if you want my PSN for proofs.
EDIT:
And all of those pictures on the op were mine. There is more at GTPlanet.
Pictures from the player who found it:
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