🚀 go-pugleaf

> Also, alphamaps are now used which I know nothing about, so don't ask me.

I believe ID 2.0 supports an Alpha channel, which is like the Red/Green/Blue
channels that give an object color, except that it provides transparency.

For example, say you rendering an animation of a flying logo as it zoomed
across a static background. You could render the background once and save it
off, then render the logo with no background, saving a lot of time. The Alpha
channel would let you then merge the two. You couldn't simply assume that, say,
black in the logo corresponded to empty background, since the logo could
contain black. (Background-color is not the same as Empty.)

Another use for Alpha would be to render a building and then insert it into
different location photographs.
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Wayne Folta          (folta@cs.umd.edu  128.8.128.8)