He does use a graphics tablet, but I honestly don’t know exactly which software he used for everything. I know he used at least Blender for some parts and AI for calibration. But I get what you mean, some of them look much more natural than others, and some look rly sloppy.
Is it actually distracting while playing? If it is, I’ll try to get newer illustrations to replace the sloppy ones over the next few weeks.