I'm slowing getting familiar with gimp/gimpshop. And so I thought I
would try a couple of toy problems. One toy problem is to create a
venn diagram. The resulting image would look something like a Visa
logo, except the colors of the circles would be blue and yellow, with
the intersection being green. Here's an SVG version which is close
to what I'm looking for. Notice, though, that the intersection is
the wrong color. (Modified from the Mozilla website on SVG.
To clarify, I'm not looking to select the intersection based on color
and then fill the selection with green, but rather have gimp/gimpshop
imitate what one would do in the real world with color filters, e.g.
acetate, and a white light.
Can this be done with the gimp/gimpshop? I'm assuming I should be
looking at layer masking and transparency. Pointers in the right
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