Luckless wrote in post #18333838
A hood of some manner is really the way to go for something like this. Any kind of filter/film that goes over the screen to try and cut down the glare and reflections from sunlight aren't going to stand up to the clarity of a good hood.
I think this is true because even if the LCD itself is properly shaded, our eyes are being bombarded with bright glare from all directions, and it makes it difficult to see the image on the screen in an objective manner, because our pupils are so adjusted to the ambient light, and not to the image on the screen.
A hood ensures that we see the screen objectively, especially if we keep our eyes under the hood for a minute or so. I just use my overshirt and pull it up over my head and camera, then give it a minute for my eyes to adjust. If I don't go to these lengths, I can't trust what I am seeing, no matter how well shaded the LCD itself is.