Take a look at John's paintings- he works from direct observation, often setting up an easel outside with these large canvases!
Please notice these characteristics of his work:
• Clear use of SHAPES of COLOR and VALUE to describe the subject.
• Use of a LIMITED PALETTE of colors.
• Bold, thick layers of paint applied with brush and knives.
Here's the link to more of his work@ http://johndubrow.com/
And here are some samples: