An atmospheric medium shot photograph of a 19th-century French artist painting en plein air at night on the damp Place du Tertre in Montmartre under a clear starry night sky. The painter and the background square are rendered in sharp, flawless photorealism, the dry air, the glowing cafe windows, the distant Sacré-Cœur, and the wet, puddle-covered cobblestones reflecting the warm golden glow of gas lamps like a mirror. In stark contrast, the canvas on his wooden easel features an exquisitely rendered Impressionist oil painting study. This study within the photo captures the luminous night scene through delicate, feathered brushstrokes and a beautiful optical mixture of colors, with shimmering points of gold and violet dissolving into one another to mimic the glowing reflections on the ground. Refined canvas grain texture, cinematic lighting, 8k resolution.