Drawing using a pencil is already fundamental to making a painting, using a pencil is considered the first thing to do before painting or drawing an object. But there is also a direct by painting and drawing the form without having to use a pencil first as the base.
Well, for the below there are some amazing 3D IMAGES OF THE PENCIL, which makes you very visible
How cool-cool is not it? Amazed is not it? Well, that's some 3 Dimensional Illusion drawn with a pencil
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