What is this pic called a sphere illusion?

Question

I made something like this n art and with other shapes do you know what it is called not just for the sphere but for shapes in general http://i3.tinypic.com/7whlmq0.jpg

Answer 1

It is simply a realistic 3D shape, which can be done in Adobe Illustrator. Here is a link of how to do it:

http://revision3.com/pixelperfect/bottle

Best wishes!

Answer 2

It is a form of isometric or perspective drawing - you have put lines on it which indicate the shape of the surface in an otherwise flat image.

Answer 3

A circle?