This is the demonstration I did for class today. We talked about cloud shapes, how this cloud was backlit and how the water color is a bounce off the sky. We also talked about calm water and rippled water and how the colors reflect off the angles of the ripples/waves. We looked at many examples and it was good to observe and learn the form/shape of things and how the light sits on the shapes.
and here is a small 5x8 inch demo I did of waves.