You say "necessary elements", but I'm not quite sure what you mean. If you take the list from the article, I wouldn't really call any of them "necessary" to cr

You say "necessary elements", but I'm not quite sure what you mean. If you take the list from the article, I wouldn't really call any of them "necessary" to create a nude painting. They were just the ones that a lot of other people were using. That doesn't mean they're definitive in any way. I use this system in photography all the time. I find breaking something down into distinct elements really helps you identify what's going on. It feels decidedly "uncreative" when you're doing it, but it works.