Tunnels: Feature Request (Multiple 3D Background Image Option)

3D Background feature (multiple images) is nice but very limited.  

I would love to be able to add different 3D background fade in determined by location - Seems like a good name for this would be a “tunnel”.  So defining what lvl 2 image and lvl 3 zoom image you see by location in the Prezi or by specific frame.

Thanks