Got this to work. It required to set the following attributes on the osg::Image 
object:


Code:

   image->setInternalTextureFormat(GL_ALPHA);
   image->setPixelFormat(GL_ALPHA);
   image->setDataType(GL_UNSIGNED_BYTE);




------------------------
Tony V

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=66535#66535





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