Robert,

Basically, I want to render my scene data onto an image which is not an OSG 
image, but has the same structure, i.e.

* 8 bits red
* 8 bits green
* 8 bits blue

The image (memory block) contains already something (see it as a background) 
and thus I only want my 3D scene objects on top of it.

Can you explain which parts of my original post are unclear, such that I can 
rectify this ?

Thank you!

Cheers,
benedikt

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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=31692#31692





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