What counts is what remains behind. Sometimes artists — especially when they are new — are over-scrupulous in comparing what they make with its model. Even Matisse acknowledged that art is a truth that’s parallel to nature. You make your drawing as faithfully as you can. You really let yourself be in touch with the reality that you think and see and feel.
Afterwards, and of course there is afterwards, you have the drawing itself. It’s its own little world. You should not care too much whether it is the exact replica of Nature as you saw her. What is it in itself? In itself is all that the spectator will afterwards know. In itself is really what counts. You were making a drawing. You are not placing a landscape of dirt and trees and bugs and animals on the floor for your spectator to inspect. You are giving them an image — a visual idea on a sheet of paper. All that they can inspect are its lines and shapes and colors and forms.
Oh, don’t get me wrong. I love Nature. But Nature and Art are not the same thing. They are sisters, perhaps. But each is her own person.
I did the drawing above one day. I don’t now know where I was or what I looked at.