This illustration is one of the projects in my online course "Digital painting with Krita 5.0 advanced level". The goal of this project is to utilize patterns and textures to replace conventional shading techniques. At the end, I use the "Color Transfer" feature to quickly change the coloring or the lighting mood to follow a reference image. If you are interested in the course, you check out the course from this link = https://www.exposeacademy.com/course-krita-5-advanced