Making of "Water hitting a rock" painting

Documentation of the painting making process. The painting is 4" x 4", acrylic on canvas, This painting was inspired by my Summer trip to Izu peninsula, a country side, of Japan where I visited a few famous water falls.
 In addition, I would like to mention that this piece is a  part of the bigger sculptural piece in progress..The final piece contains 6 paintings in an aluminum attache case  with build in lighting system.