But I also didn't want to just repost the same image, so I decided to also include the Alternate Mode and a glimpse of the process for these illustrations, a process I later refined to go quicker and accomplish scary amounts of work like the TF pop-up book. So, there are some differences from what I did back then and what I do now. But the principle is the same: on a refined enough sketch, I create very precise flats that will help me in selecting areas while rendering. I copy the layer and reflat with right colors, then copy the layer again two more times. I set the top one to Color Burn with 50% opacity and the one below is set to Colorize. The first copy is then converted to just grayscale and then rendered with an airbrush in various modes. Between the rendered layer and the color layers, I add a texture layer I created with custom brushes. There are a few extra steps here and there, but this is the basic idea.