Imagine a Fly (a tip about drawing dark and light lines)

“Imagine a fly walking on a surface. If the fly walked across a line and disappeared by going around a corner, then that line should be heavy. If the fly walked across a line which marked a change in material in the same plane then it should be light.”
Brian Ramsey, “Trade Secrets”

Or if flies give you the heebie-jeebies, perhaps imagine an ant.

Or a caterpillar, though not a very hungry one like Eric Carle’s.

Hairy Caterpillar

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