Spirit Painting were portraits and other artworks, done in various media and produced under a variety of conditions but ascribed to spirit entities. This "phenomena" commonly manifested during the heyday of spiritualism in the 1850s.
They were often portraits of those departed, while looking like artworks done by professionals, they were produced under remarkable conditions. For example, during a short time, in complete or in near darkness. The Bangs Sisters mediums made a career out of doing them.
Magician Henry Clive (1882-1960) featured them in his act and was possibly the first to do so in the United States, when he move there in 1903.