Chapter 5 Proportion and Rectangular Shapes

Objectives Understand proportion and use it to draw rectangular objects. Define the horizon plane and be able to draw all the objects in a still life on the same horizon plane. Use shading and contrast to clearly define the shape and volume of rectangular objects.

Drawing in Proportion Measure proportions of each side of a rectangular object to the other sides. Draw what you see, not what you know!

The Horizon Plane Horizon plane extends out from your feet to your eye level (horizon line). All objects in a drawing must sit on the same horizon plane.

Rectangular Shapes Rectangular shapes have six sides like a cube, but the sides are not all the same size. Determine if you see one-point or two-point perspective. Measure the proportions of the sides.

Volume in Rectangular Shapes (1 of 2) Render light area, highlight, and shadow areas. Use contrast to bring nearest edges forward. Render both cast shadows, including the dark line under the second side.

Volume in Rectangular Shapes (2 of 2)

Summary (1 of 2) Proportion Relationships of an object's height, width, and depth Use sighting techniques to correct proportions among the planes of an object. Horizon plane Imaginary flat surface extending from feet to eye level (horizon line)

Summary (2 of 2) The rectangular object is a variation of the cube. Every object in a drawing must sit on the same horizon plane. The rectangular object is a variation of the cube. It has six sides, but they are not all equal.