Brain hand paradox
Painting a tree, we need to choose between an impressionist approach, with large brush strokes and attention to values and shadings, and some realistic painting either naive or scientific, where every leaf is represented. The paradox follows : we dont have to make a choice when we look at the tree (we have both the shape and the details), the naturalism problem is to represent a tree on a 2D flat surface.
When we cant see both the leaves and the shape at any time, we arent out of the woods yet.
