Mixing analog with digital always works. Despite the advances in technology and the tools that help us to recreate and emulate diverse effects, there's nothing like using the materials to get the assets and textures you need.
Guilherme Asthma is a freelance visual artist from São Paulo, Brazil, he shared a stunning and impressive animal painting studies using Photoshop (for one) and a photograph as a reference. These are righteously fascinating! I took the liberty to share its entire project, my favorite one is actually the 'fox'. I mean just take a look at the different spots of lighting and colors. It's a true master and his craft and it's going to keep on making greater art. Make sure to follow Guilherme' work.