Alpha texture problem

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From: Andreas Ekstrand (Andreas.Ekstrand++at++saab.se)
Date: 03/27/2002 08:11:31


Hi,

I have noticed that polygons with alpha textures (e.g. flat trees or
bushes) become somewhat strangely rendered when viewed in front of each
other. If you're viewing such a polygon in front of another, you can
actually see through the second polygon through the edges between the
alpha and non-alpha texels of the first polygon.

I know, this might sound a bit confusing, but I'm sure this is a common
problem and has been noticed by many Performers out there. It doesn't
happen on IR/IR2/IR3, but it does with Octane/Octane2 as well as with
Geforce2/Geforce3. I have attached an image that shows the problem quite
clearly. Could anyone describe why this is happening and if you could
avoid it?

Regards,
Andreas Ekstrand

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FDM-AE Andreas Ekstrand |E-mail: Andreas.Ekstrand++at++saab.se
Saab AB                 |Phone:  +46 (0)13 - 18 40 42
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trees.jpg


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