I used to do pencil drawings, but I haven't done that for a long time.
These pencil drawings are about Anamorphic Art. Read on to learn more. Morph means to reshape something. Anamorphic means to re-shape it differently in different directions. This kind of art was started a few hundred years ago - I forget if it was the 1500's, 1600's, or 1700's - somewhere around there anyway. I think it's little-known nowdays.
Here's a pencil portrait I did. (it's about 20 x 30 inches)

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Here I drew the portrait again, but this time I transformed it to an anomorphic drawing.

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Then, you place a
cylindrical mirror on the drawing (I made the mirror myself).
This "undistorts" the anamorphic drawing, so you can see the perfect
image of the subject again.

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Here's a close-up.

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Pretty cool, huh?