"Greg M. Johnson" <gre### [at] my-dejanews com> wrote in message
news:39B8E565.987346EF@my-dejanews.com...
>
> Say you're doing a 400 x 300. That's 1200 pixels.
> First you shoot pixels AS IF it were a 40 x 30, where you choose by some
> algorithm 1 pixel out of every block of 100.
> Report the color of these pixels to the viewer as if it were ONLY a 40 x
30.
> Now assume it's a 160 x 120, shoot 3 pixels out of every block of
....... and
> so on......
Doh! Of course. That makes sense. My notion wasn't even sensible - it would
take just as long (longer actually) to work out the average for a mosaic as
it would for a full render (since you have to calc. the rgb for each pixel
before you can average them).
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