Good evening friends of this community.
Every day learning a little of everything in this area of the art of drawing.
Learning to draw in 3D, I wanted to make an optical illusion with a sphere and a hole in charcoal.
The purpose was to show that the sphere was in the air and under it a semi-deep hole, trying to give the best symmetry so that the sketch seemed real.
Procedure. . .
It is interesting to learn to draw in this dimension, I will continue practicing to show you better content with good symmetry in the future.
I hope your optical illusion is acceptable to this sketch.
Goodbye and thanks for your great support.