Here is my first attempt at a landscape without a reference image. I just made a sketch with sketchbook and used that as my guide. I see several things that I can improve upon across the board, many of them being basic art concepts, principals and design and but I'm happy with this result.
The best part for me was that after all of the hours practicing making brushes and controllers, I was able to make the ones I needed for this in less than a minute usually (except for the color swatch picker). It made just doing the project a lot faster and less frustrating.