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September 30, 2016

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Messing around with one line and digital filters

Abstract head

Mixed media on rice paper

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Davinci's Polyhedra

Leonardo da Vinci's Polyhedra Leonardo da Vinci (1452-1519) was the quintessential renaissance man: artist, mathematician, scientist, and engineer. He was a great lover of geometry, and devoted much time to it starting in his early forties. His most outstanding polyhedral accomplishment is the illustrations for Luca Pacioli's 1509 book The Divine Proportion. At right is one of the illustrations from that book. The term Ycocedron Abscisus in the title plaque means truncated icosahedron, and the term Vacuus refers to the fact that the faces are hollow. (The drawings are beautifully hand colored like this in the Ambrosiana manuscript, reprinted by Officina Bodoni, 1956, and also by Silvana Editoriale, 1982.) These are the first illustrations of polyhedra ever in the form of "solid edges." The solidity of the edges lets one easily see which edges belong to the front and which to the back, unlike simple line drawings where the front and back surfaces may be visually c...

Burst #2

Brilliant purple plumes burst forth to receive the radiance of the light. Sweet new aromas fill the peaceful breezes. Moving upward and outward to reach the light, always seeking life.

Beginner Sketch Exercises

10 free and fun sketching exercises. Improve your drawing skills today. 10 Sketching tips

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