I wrote about that here, featuring one of his Fine Art attempts I'd seen at the Branywine River Museum in Pennsylvania a few years ago.
It happens that more such works can be seen at the Farnsworth Art Museum in Rockland, Maine (museum site here, Wikipedia entry here). The Wyeth family spent many summers in Maine and Betsy James Wyeth (1921-2020), Andrew Wyeth's widow, donated a number of works by N.C., Andrew and Jamie to the Farnsworth.
Below are iPhone photos I took when visiting the Farnsworth around the 10th of June of this year. Images of entire works are uncropped and include the nearby information plaques to provide a sense of the paintings' sizes.
Raw images are larger than usual here, so feel free to click on them for significant enlargement.
This was the only example of N.C.'s illustration work on display. Its composition is influenced by the endpaper vertical fold line running down the center.
Wyeth's illustrations were usually quite "solid" in their treatment of people and key objects. His Fine Art works varied from this to one degree or another.
Here Wyeth seems to be trying out "naïve" (untrained) art: note the unrealistic sizes of some of the subjects.
This is the most abstract of the paintings I saw. Very large, rather interesting. But he seems not to have pursued this approach further.
Solid details, but twisted perspective and other wisps of Expressionism.
Unfinished painting left at the charcoal-on-canvas stage.
This probably reflects N.C.'s illustration procedure.
Again, a little Expressionism, but coupled with 1930s modernist simplification.
Apparently Wyeth was dissatisfied with the composition. One eliminated detail is the boy at the left.
The latest of the paintings I saw. It vaguely reminds me of Edward Hopper paintings of buildings. Could N.C. have been influenced by Hopper here?