Another stab at playing with black and white underpaintings!
Here’s a sunflower with the values outlined in grayscale. This would be a lot more effective in real media, like oils, but it’s fun to practice digitally. My values were a little close together, so I made the highlights brighter on the colored version.
I wanted to keep this loose and blocky, so I used only palette knives. They’re flat and square, and make flat, square strokes. Making oval-shaped petals is kind of a chore, but ah well, this was just an experiment.
I like the way the values came out so distinct and luminous. Doing the grayscale underpainting gives me a better grasp of how the light is going to fall. I might do this a little more often for bigger, completed works.