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Perspective Without Pain by Phil Metzger

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Combinations of Cylinders

Many of the objects you draw are not neat, single cylinders, like the silo or a can of beans or a stack of coins. Some are odd combinations of intersecting shapes. One of the most common objects we draw is a tree, and its skeleton may be thought of as a network of intersecting cylindrical shapes. Imagine this tree, top, to be composed of cylinders or a bunch of pipes installed by a crazed plumber, bottom.

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Sometimes it's easier to visualize pieces of pipe stuck together than to see what's happening to tree branches. I paint trees often, yet I still find this concept extremely helpful when I'm having trouble getting branches ...

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