OK - I actually did this once already. My simple version. I just took a picture every minute in grayscale, then stacked them, then banded that by brightness, th

OK - I actually did this once already. My simple version. I just took a picture every minute in grayscale, then stacked them, then banded that by brightness, then laid that color on a shadowed picture so you could kind of see what was what. Key improvements though would be some type of classification of sun vs not sun for a pixel (based on the entire stream of pixels for the day for that spot to make it easier) because dark stuff in the yard / walls etc messed up my approach. And banding the color (most gardening says things like needs 6 hours of sun a day) so you can clearly see outlines of areas by hours of sun. Yes, a lot of people don't know how much sun a spot gets and don't want to sit out all day watching (front yard / back yard etc).