[ quesa-Bugs-922742 ] Alpha textures do not work properly with fog or specularity

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Bugs item #922742, was opened at 2004-03-24 16:32
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Frank Condello (pox)
Assigned to: Nobody/Anonymous (nobody)
Summary: Alpha textures do not work properly with fog or specularity

Initial Comment:
In order to mimic QD3D's pre-multiplied alpha behaviour, Quesa 
resorts to using an additive blend mode for textures with alpha bits 
(GL_ONE, GL_ONE_MINUS_SRC_ALPHA). This works for the most 
part, but results in vertex effects like fog and specular highlights 
being blended additively over entire polygons rather than clipping 
to the alpha channel, as they would when using a blend mode like 
(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA). QD3D does not 
display these artifacts, so binary compatibility is compromised in 
these cases.

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