John Constable, Brighton Beach Constable took his inspiration from the beauty of his natural surroundings, although he was never fully appreciated in his own time. Constable's oil sketches have come to be seen as avant-garde.
I love that in every stroke you can see the colors that were halfway mixed together. This makes for a more realistic effect than one flat color per stroke. Reflection (Isle-aux-Grues), by Raynald Leclerc