I'll be adding other variants in a moment with things like accessories that are optional for future art. Everything present on this ref is not optional.
Notes to self-
Arm and leg markings are always asymmetrical. Hair can be messy or curly and can be above or covering his eyes. The spots can be placed on any part of his body, the only spots that never move are the pink and blue spots under his right eye and the pink spots on his right shoulder. Nolan always has some variant of a tired expression and his scaleras are always tinted pink (due to sleep deprivation)