We live on a cliff over the Deschutes. this provides me with great subject matter...the river, the distant gorge, mountains,etc. Recently I had painted the last light of day on the distant cliffs. However, the more I looked at the painting and the more I "over painted" it the more I realized it was ready for the belt sander. So I did just that...sanded it away. Then using the same linen board, I changed it from a 20x16 to a 16x20 painting...I had some photo referenced of the same view with huge cumulus clouds...the same light on the cliffs, but the sky dominated this painting. Like it much better!