Actually, Okami's technically not cell-shaded. I noticed
this while playing a while ago, but all they've done is put
a solid-black shell with flipped normals around most game
objects. (Think about it, this would make a black outline
around everything - the thickness of this line is controlled
by the space between the game model and it's shell) The
world is drawn and the resulting image is put through a sort
of high-pass filter, making any dark details darker, (ie it
helps make black outlines)
It's really quite clever.
This has got to be 10x faster than actually cell-shading
everything too. And to top it off, apparently no one can
tell the difference!
this while playing a while ago, but all they've done is put
a solid-black shell with flipped normals around most game
objects. (Think about it, this would make a black outline
around everything - the thickness of this line is controlled
by the space between the game model and it's shell) The
world is drawn and the resulting image is put through a sort
of high-pass filter, making any dark details darker, (ie it
helps make black outlines)
It's really quite clever.
This has got to be 10x faster than actually cell-shading
everything too. And to top it off, apparently no one can
tell the difference!