[osg-users] gl_fragcolor.w

[hermens]

Hi all.
 
I implemented a water shader in a little demo. Everything looks fine but i can't get the alpha of the gl_FragColor to work.
 
I also looked in the osgshaders example but there is the same problem. For example if I change the gl_FragColor in file blocky.frag to gl_FragColor = vec4 (color, 0.2) i don't see any difference.
 
Any reasons why?
 
Thanks in advance,
 
Hilmar.
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