Drawing a 3D Cistern - Optical illusion - Trick Art

Drawing a 3D cistern or pit with Prismacolor Verithin colores pencils. The Verithin are excellent for drawings of great detail. They have hard tip which can sharpen and are soft to coloring. Hope you like it and please share and leave your comments. Thank You.
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MATERIALS:
Blick drawing paper
Pencil 2b
Prismaclor Verithin color pencils
Spectrum markers
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