Solargraphy studies and long-duration exposures.
Solargraphy is a hybrid photographic process that combines analogue pinhole and digital with the final image being captured by a scanner rather than chemically in the darkroom.
Its magic is in the very long exposures over days, weeks or months. Like lumen, the image is burned onto the photographic paper by UV light, turning the silver dark and forming a negative image of the scene outside. The negative is then finally scanned. As the light beam passes across the negative the scanner both captures and destroys the image.