One cute trick for an RV'er who's also in the plastics business might be to pull a mold from the inside of an RV canopy (that's step #1).
Step #2 would be to then form plexi formed panels in various UV absorbing tints that would cover a portion of the top of the canopy.
Step #3 is to use one of the magical adhesives that would allow a retainer to be bonded onto the inside at all four corners of where the new panel would attach in place.
If the the attachments were a "clip on" type, the user could take the panel off at any time, and the only obstruction left would be the very small attachment corner pieces.
Since I'm just the "idea guy", my work is done.
