Mosaics found in a church in Napoli seem to reveal weird faces; touched up to add contrast and texture.
Photographs taken from unconventional angles and painted over.
Folding paper then drawing in creases creates pseudo-symmetric patterns.
Hand-shading ‘parquet deformations’ (c.f. William Huff) creates a variety of 3D impressions.
Photographs taken in dark moving environments, then painted over to create imaginary landscapes.