I deleted my old GIMP tutorial because it was really outdated. So I decided to make a new one, but this time a step-by-step/process kinda thing. You can look at the original picture here. [link]
Here's the process.
Step One: Scan in sketch. Step Two: Lineart. Step Three: Base colors. Step Four: Shading. Step Five: Lineart adjustment and Levels. Step Six: Background Step Seven: Texture and DONE!
I also made Speedpaint video!! You can check it out here! [link]
Here's a warning... I was bored so there's a whole bunch of annotations... some of them are useful... but most of them aren't, so feel free to take them off...