Why is Halo 3 cartoony while games like COD4 are realistic looking. I mean I know COD4 is modern but Halo 3 shouldn't look that fake.
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Games don't need a small color palette to be a good game. Its a type of graphics style. VALVe went from making more-realistic looking games (Half-Life 2) to making Team Fortress 2 (makes Halo look extremely realistic) and it was still a great game. Video games are a type of art. The art type depends on the artist. Every artist has a different perception on how their final product will look.