This is the homework assignment for Tim Horn's plein air class. We were told to paint a cantaloupe slice showing the lights and darks, using a value plan prior to painting. This process is described in Kevin MacPherson's, "Landscape Painting Inside and Out", pages 58 through 61. Here is both the value plan, and the painting. In regard to what I painted on the first day of outdoor painting, let's just say, we're all learning.