His portrait of Barun Vranicany (detail) shows solid drawing and a sense of the pointillist’s small touch.
A photo shows his working method. The courtyard setting offers soft and indirect light, perfect for a portrait. The paintbox, mahl stick, and paint rag sit on a chair in front of him. His handheld palette has a single medium cup. He holds about three extra brushes in his left hand. 
Another photo shows him working out the full-size drawing for a mural, while referring to a smaller layout.
'Portrait of a Daughter' shows what’s possible with a disciplined limited palette, probably something like black, Indian red, and yellow ochre.Thanks, Valentino Radman.
More at Wikipedia.