Notes:
- He needed eyes. A couple pixels at 64×64 did the job. For the ultra-fine detail on the forehead atom symbol, I had to go all the way down to 256×256 resolution. I could have done it at 512×512, also.
- I need to think about away to do a glow effect. Maybe just a gaussian blur, but I don’t know if that is right for pixel art. For now, this works.