Here are large scale (about 3 ft. X 4 ft.) oils that Doug is working on at the studio:

Same on as the first one, but this one has some glare from the flash in the middle...
 

This is an old bristlecone pine.  The image is a bit blurry!
 

This one has a blue monochromatic wash (that's how he sketches the imagine in)
and he paints over the top of it....