100 Words Statement
The penetration of light will form a shadow that can change with the angle inside the space.
The shadow of light passing through the small gaps of opaque material can be used as a decoration.
In my week9 model, I placed parallel long wooden sticks vertically as curtains for French windows. The shadows cast by the light from the gap between each wooden stick overlap or stagger because of the sloping window surface. Played an additional decorative effect. In addition, as the point light source moves, or the movable French window moves, each shadow is unique. Thus, these shadows that change with the light play a good decorative effect.