Experimenting with Clip Studio Paint Pro. Started off with a blank canvas and a 500 px size piece of charcoal. Then gradually decrease the size of the charcoal while refining the image.
Really had no idea what I was drawing when I started, just kind of let the image form itself out of the lights and shadows. I was going to upload a time lapse video to show the process, but unfortunately I accidentally saved the file as a png which apparently deletes the timelapse information.
Other than that, great program Clip Studio Paint Pro.