Andy warhol I’m pretty sure
Mannerism stepped away from being perfectly proportional in paintings. artists created their subjects with exaggerated limbs, and they often looked at the fearful and tense subjects of society rather than the beauty.
This can be conveyed in HOW some people use shading techniques
To be good at art and know what you are going to paint and have oil paint
Where do you live Aidan Gallagher??
Hope that helps!!