Points,
angles,
converging
lines reaching out
into endless space.
Proportions dependent
on proper ratios from
eye level to vanishing point.
Mathematical consistency
creating dimensional points of view.

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I’ll never look at a box the same way.  In my basic drawing class at the Virginia Museum of Fine Arts, we spent the whole session learning about drawing with perspective.  It was a real test of using the logical left side of my brain.  It was fun, but exhausting.  Who knew it could be so complicated to draw a simple box!