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Posted: 2006-08-19T11:52:25-07:00
by dognose
I would do it in two steps instead, having the shading as a seperate mask.
Then, you'd just change one color in the original image, then apply the mask.
Posted: 2006-08-21T20:03:49-07:00
by anthony
You can also preserve the highlights and shading by using the mask to
overlay the color as a 'tint' either using -tint OR the 'overlay' Alpha Compositing method.
See Tint...
http://www.cit.gu.edu.au/~anthony/graph ... olor/#tint
and Overlay
http://www.cit.gu.edu.au/~anthony/graph ... e/#overlay
I use both of these to good effect in the Advanced IM Examples page
against a 3D shaded greyscale shapes.