Comment by Izkata

> Art doesn't have source code.

Drawn art absolutely does have something like it:

https://www.reddit.com/r/learntodraw/comments/nibjjn/any_adv...

It could be considered similar to scaffolding or boilerplate in code, except usually none of this is visible in the end product, while the code boilerplate is always there. These lines are drawn light and completely covered up by the end result - sometimes even manually erased depending on the medium.