The 30-3-3 Rule is something that was recently attributed to Michael Workman- an artist whose work I admire-but I've also heard variations of it over the years attributed to many different sources. It goes something like this: From 30 feet a painting should catch your attention and draw you across the room; from 3 feet it should show the artist's intentions, the concept, the story; and from 3 inches it should be visually interesting to look at. This seems to me to be a worthy goal to aim for in my own work.
I finally had time to tinker with the images of Summer Aspens to get something that is much closer to the original. Here it is with some details.