I’m resurrecting this old thread as my question is applicable.
My darling wife gifted me a really nice pair of polarized sunglasses, which as you can imagine, has a negative effect on the HUD.
I have tried numerous ways and orientations of polarizing film and transparency paper (for you young folks, that is how we used to “present” things on an overhead projector). I even went so far as to cut the perfect piece of film to fit the HUD screen.
Not surprisingly, it seems as though the actual HUD is a function of the windshield and not what is projected from the small screen in the dash. No matter what orientation I put the film on the screen it didn’t affect what is displayed on the windshield.
Can anyone confirm how the actual HUD works?