Starting With the Charcoal Drawing in Oil Painting

I recently painted a classical "bluesaille" mural in a large dining room.  I wanted to share some of the process.  In the video here you see me laying out in loose sketch form, a corner where trees are the predominant feature. I will lay the oil colors directly over this drawing, using some of the charcoal in the drawing that moves with the glaze, to darken and tone the preliminary blocking in of the painting.