Kathryn Clark 's comment on The Two Plein Air Artists

I agree completely. There's another thing to consider when the desire to change or add after you leave the "full sun" where you painted. When one is painting in full sun, the pupils of your eyes shut down, and you don't necessarily see all the color in the painting, haven't added enough contrast, included enough darks. It's important to look at the painting in even, natural light to make those important adjustments. Also, if you really want to add something or make a change after you leave the site, for goodness sake "Go ahead!", I'm sure your collector wants to have the painting you think is finished!