Wilhelm von Kobell (1766 – 1855) – Riders at the Tegernsee Alte und Neue Nationalgalerie (Berlin)

The picture has something of this: cavalry, mammal, landscape, seated, people, outdoors, daylight, mountain, desert, livestock, herder, transportation system, camel, group, mustang, horse, two, vehicle.
Perhaps it’s a painting of a man riding on the back of a white horse next to a herd of horses and a dog on a dirt road with mountains in the background.