[osg-users] Can't write to ALPHA component with custom fragment shader in RTT pass

[Joseba]

Hi,
I had some similar problem sometime ago and i solved it changing the internal format of the texture for the RTT. I also had some issues using FRAME_BUFFERS instead of FBOs, but you are already using them.

Regards,

J.

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http://forum.openscenegraph.org/viewtopic.php?p=8103#8103