Okami

The game was originally planned to be rendered in a more photorealistic 3D style. However, Clover Studios determined that the more colorful sumi-e style allowed them to better convey Amaterasu's association with nature and the task of restoring it. This change did not increase the game's performance. You can play a video clip of Amaterasu in her original style after beating the game.

[info from Wikipedia]

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