The returns in ExportAnimatedCamera didn't include the path toward the undistorted images so I added it.
The Blender Rendition nodes can now (among other things) diplay cloud of points. The code is cleaned up and only the background image sequence remains to be implemented...
The node is almost functional. The animated camera works but the imported cloud of point isn't visible is rendering... I'll need to find a way to make display it.
(For now there is a cube as a placeholder in the scene to show the movement of the camera)