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Subject: 1/z interpolation etc..



Hi,

I've been told that if you're dealing with non-piercing
(non-intersecting) polygons, interpolating z across scanlines (in
screen space) as opposed to the correct 1/z is OK as far as z-buffer
concerns go. This doesn't seem obvious to me? Is this a correct
statement? Can anyone offer refutation/confirmation?

Many thanks,

Richard Hayden.


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