Subjective Movements

This spiral seems to spin, it just vibrates but does not rotate.

You may see 3 different discs rotate, actually one only does it.

Although the disc rotates clockwise, the spirals seem to spin in 2 opposite directions!

The rotational motion of the disc makes the "rays" of the geometrical shape flutter irregularly.

Which direction is the rotation? Some spokes appear to rotate CW while the disc rotates CCW.

The rotation creates a 3D depth effect. To enhance the effect stare at the center of the disc.

Subjective Shades

Stare at this disc, the corners of the spinning square create dark zones.

If you look at this disc for a while, you may see colors (green and purple pastel shades).

The circular patterns A and B below may spin if you slide a      
grid (a transparent overlay pattern representing vertical stripes) across them!

Vertical stripes

Vertical stripes

Another example of motion with static images.

The image below represents a printed card with a curious design consisting of a collection of vertical lines. These lines contain information about six different images, that together form an animation ('Dancing Man'). As a green grid is slid to and fro, different selections of lines become visible, and the animation appears!