CompositeViewer and Canvas

Hi all,

I wonder if there are any updates regarding this topic: 
https://wiki.flightgear.org/Hackathon_Proposal:_CompositeViewer_and_Canvas

I am also not sure if it is a good idea to pass the camera image through 
canvas. Why not pass the camera image to a background texture in a 
fragment shader? Then in canvas you just need to make the background 
transparent or opaque to show or hide the camera image.

BR Daniel