Abstract: A method for producing a material with anisotropic optical properties, the method comprising: fabricating a patterned mask with alternating opaque and transparent regions; assembling a stack containing one or more layers of photosensitive material; and exposing the photosensitive material through the mask to photographically reproduce the pattern or its inverse. This photographic copying process yields a reproduction which is inherently well-registered to the mask's pattern, and the resulting registered patterns allow transmission in some directions whilst blocking transmission in other directions.