Experiments drawing and painting in 2d with various styles. Since I work mainly in 3d I approach concept art in the same way. I paint in render passes and then composite each pass into a single image. This is definitely more time consuming, but it makes iteration a lot smoother for me because its a non-destructive workflow. I have a gif here showing the process.
The final version is at the top, and Ive included some fun experiments below.
Thanks for looking, and if anyone wants deeper explanation Id be happy to dive further. :)