
I put in some lighter and some darker areas of the grey in and around the trees as though a breeze is moving it through the landscape.
While the fog was drying I mixed a greyed green of French ultramarine blue, raw sienna and burnt sienna.
I started with the furthest back trees and started with the first grouping of trees and put in the tree tops and with water soften the bottom of the trees to indicate the fog.
I continued working from the furthest back trees and gradually moved to the middle ground trees softening the bottom of the trees and on occasion lifting a small amount of colour on the tree itself.

On the foreground trees the colour was darkened again and each time the trees were added I would soften the bottom of the trees with clear water to form the fog winding through the trees.
If you would like more information about ACEO please go to my post on 11 March 2010.
The ACEO shown here is an original watercolour painting using Artist quality Winsor & Newton paint on 140lb. Arches 100% rag, acid free watercolour paper. It is priced at $20.00 and sold unframed.