Mainly I was trying to work out whatcolour to alpha is. Still not sure.
(
the_rhyme_minister has a little bit of gold and a pager,
Wed 16 Jan 2008, 18:53,
archived)
It changes the chosen colour to transparent(called the alpha layer) CanonCaliber A big bore,
Wed 16 Jan 2008, 19:08,
archived)