From: kindaian on
I've an image, filled with white and with some areas with a solid color which
varies.

1. How can i transform one of the colors at my choosing to black and all the
others to white (to use it as a mask)?

2. Having 2 diferent images, how do i use the mask to "copy" the black pixels
in the mask, from image 2 to image 1?

Tryed to "grok" the excelent article
http://director-online.com/buildArticle.php?id=1029 but somewhere in between...
i lost track (specially because i don't want any "effect", but just a blend of
the images based on a mask build with one color).

Thanx in advance,