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Subtractive Forms

Architects can also design structures by using the subtractive method. This means that portions of a plane or volume are removed, altering the original shape. Sometimes subtraction can change the original form — a square can become an “L” shape — but other times the original form remains recognizable.

Buildings designed by the subtractive approach often are designed from the outside in, and appear regular from the outside — as if carved from a solid piece. They are aesthetically pleasing, but at times cannot adapt easily to changing needs.
 

Look at the subtractive form Examples, then click the 3D Exercise tabs to create your own subtractive forms. Click on the block to select sections of it and press the delete/backspace button on your keyboard to subtract a chunk of the form. Use the View tools to move the camera angle. The Reset button will let you start over.