A single lamp base, equipped with a matt protecting glass, is placed quite close behind a small opening of two polystyrene walls and this is the reason why the shadows of the two walls are soft and evenly graduated.

The model, however, is far away from the light source and close to the background wall - her shadow appears hard. To avoid too much indirect light, and to guarantee a high contrast, the polystyrene walls are painted black on the side facing the lamp head whilst black cardboard (not visible in the diagram) blocks most of the light going towards the studio’s ceiling.

by Urs Recher