Moving Rolls Optical Illusion

Is this image moving?

See Another Random Optical Illusion

Scroll down for the explanation.

Most people can see the optical illusion move and shift if they look at it carefully.

Explanation

Since we live in a three dimensional world, our mind tries to convert a two dimensional object into a 3D one. In this optical illusion, our mind tries to make sense of these 2D objects. The shading used in this drawing is completely incongruous. The eyes lock onto a bit of the illustration that looks appropriately shaded but then finds it disjointed with shading in other nearby areas. The eyes keep jumping around the drawing trying to map out a 3D solution that would make the shading illustration make sense, but it never seems to work.