References for various fundamental things - composition, balance of details etc. I don't have sources for most of these as its something that was lying on my hdd for a while, but you should be able to look it up through google images.
INTP psychonaut on a voyage into the inner universe. I'm a somewhat-human person who lives on planet Earth - just like you! Passions include art, music, psychedelics, nature, and of course, jellyfish. Harm reduction, not prohibition. Read up.