To know how to learn to draw in 3D, there are certain parameters that I will explain here step by step so that with your hand, a sheet of paper and a pencil you can make this optical illusion and make it look real without the need for much just follow the steps of 31 designs that you can do.
You will make a 2D figure look as if it were in the third dimension.
This is called anamorphosis.
Anamorphosis is the deformation of an image, so that when viewed from another angle it appears to be in the third dimension.