Optical diffusion of colour and light

 A thin layer of Lochaline Sand on stretched organza,
set in a frame 3cm depth,
Light and shade from structures behind this screen are radiated onto the surface.
A sheet of white paper reflects the internal light back to the viewing suface
 
 

Veneers of wood, sycamore and walnut, placed behind the screen,
create shadows on the sand surface

Rear view:
Circles of sycamore veneer
attached to the  reverse side
of the sand coated organza.

coloured paper

coloured paper on reverse
side of sand screen

paper forms behind the screen
 

Leaves and oranges
  coloured paper, sand screen

Leaf Screen illuminated by TV light

.

Invisible Picture
Passing shadows reveal the hidden forms behind the screen of sand