Grey-scale Hills
11x14 acrylic on Bavarian linen panel
Buy it at: https://www.dailypaintworks.com/Artists/gregory-cross-8940

I originally intended this one as an indirect painting but realized, after I painted the grey-scale to get the values right, that there really wasn't that much color in the reference photo. So, I left it in black and white. Works just as well and I don't have issues with washed out color when I take a digital photo.