Abstract: Exterior solar shading comprises at least one elongate rigid light-transmissible louver. The louver has an infra-red filter element which prevents or limits the transmission of infra-red energy, and a light redirection element which reflect visible light passing through the louver. The light redirecting element is integrally formed in a major surface of an outer louver element of the louver. Preferably, the light redirecting element is a plurality of formations such as recesses, for example, grooves, or projections, which may preferably have at least one mirrored surface.