There is a painting with no visible brushstrokes - Apparently.
The 1955 abstract expressionist masterpiece "No. 61 (Rust and Blue)" by Mark Rothko is a large-scale oil painting on canvas that appears to be a solid expanse of color. Measuring 8 feet tall and 6 feet wide, the painting's rectangular shape is divided into two horizontal sections, with the top half a deep, rich blue and the bottom half a warm, rust-colored hue. Despite its abstract nature, the painting's surface is remarkably smooth, with no visible brushstrokes or texture.