Is it possible to use a photochromic film for car windows? It's the stuff that gets dark in the sun and then light again at night or indoors. I found this website, but I really have no idea if this would work or even be practical. Probably way expensive if it can be done.
https://www.weetect.com/photochromic-sheet-and-film/
https://www.weetect.com/photochromic-sheet-and-film/