Interesting thoughts. I also still have the not so great boat cover that I got from that company I won't mention. Somehow I was able to keep it after winning the credit card dispute. Maybe I could put that to work... One issue I see is that I'm not anchored in open water when sitting out storms so the boat won't always be pointing into it. We're always beached and inevitably the storm seems to always come from the side. Case in point:
Nice and cozy on the port side while the captain's chair is soaked. The other problem is getting whatever it is not to flap around like crazy. Probably would have to be customized.
But the more I think about it, maybe I could actually get what would amount to being similar to a full camper enclosure but in 4 separate pieces that could be deployed as needed. One piece of canvas for each side, one on the front and one on the back. Easy to tuck away when not needed and easy to put up to deflect that low angle sun in the afternoon or that sideways rain in a storm, or even wrap the whole thing up completely. I think it could be done with just a few pieces of aluminum rail added that could be removable. Here's a mockup:
The red would be one of the side canvases and the green would be the added aluminum rail that would be removable. probably with a couple thumb screws or something. With that aluminum in place, it would be pretty wind resistant and pretty easy to then add a rear panel and/or front panel if needed. Just use the existing snaps and add some to the bimini rails. Maybe even make them zip together, put in window panels and so on. Man, I am liking this idea... anyone have any idea what I might expect to pay for those 4 panels custom fabricated?
Sorry to derail from the topic of overhead shade. I'm really interested in that too!