Shadow Art: How Relief Sculpture Uses Light, and What to Look For Before You Buy

Shadow Art

Relief work that casts its own shadow. Nothing on the wall moves, but the piece is not the same at eight in the morning as it is at four in the afternoon.

Relief in Black, an original cardboard relief artwork by Lisa Ketty, on a white wall beside a window where daylight crosses the surface from the side

The light does the work

A print reflects light evenly, so it looks the same at any hour. A relief does not. As the sun moves, every shadow on the surface changes length and direction.

Low morning light stretches the shadows and the piece looks at its deepest. Midday flattens it. A lamp from the side holds the deep look after dark.

White Relief, an original paper pulp wall artwork by Lisa Ketty in a light wood frame on a grey wall

White Relief. No colour to carry the image — the shadow does all of it.

How deep is deep enough

Find the shadow the raised areas cast onto the surface below them. If you can see it clearly in an ordinary photograph, the relief is deep enough to work in a real room.

If the photo looks almost flat, the piece will look flat on your wall too.

Close-up of a red and grey geometric relief surface by Lisa Ketty, each raised edge casting a visible shadow

Red Relief, close up. Every raised edge throwing its own shadow.

Blue Paper Pulp Relief, a framed original paper pulp wall artwork by Lisa Ketty with a soft textured blue surface The Blue Torii Gate by Lisa Ketty, an original layered relief photographed at an angle so the raised edges cast shadows Close-up of Relief in Black by Lisa Ketty, machine cardboard cut down into its layers to form a geometric pattern

Soft edge or hard edge

Paper pulp is formed wet, so the edges round off and the shadow fades rather than stops. Cut cardboard gives a clean edge and a hard shadow line. Soft rooms take pulp. Graphic rooms take cardboard.

Where to hang it

A wall at right angles to a window is best — daylight crosses the surface from the side. The one arrangement to avoid is a ceiling light directly above and in front. That removes the effect entirely.

Only one of each

None of these are editions. Pulp dries differently every time, and a cut into cardboard cannot be undone or copied by hand. If a piece sells, the closest thing to it will be a different piece with different shadows.