[Sam Cree]

"We don't usually do that in class, because I just relish the brushwork as it is"

I'm not qualified to really comment on those guys, but I can bet that the artists themselves were squinting as they painted.

[Samwise]

but I can bet that the artists themselves were squinting as they painted

Squinting helps me realize how good some of these paintings actually are. I have enjoyed reading some of the articles speculating about the vision problems of famous artists.