Ok. Not so easy is it?

If you have never looked at one of these 3D images before, it takes a special knack.

First of all, don't imagine things in the image. When you see the three dimensional image it will be clear and unmistakable.

The idea is to focus the eyes at a point behind the image, not on the image itself. You sort of stare into space. Many people have luck by moving close to the picture so their eyes are naturally out of focus and then moving back slowly without refocusing their eyes.

Here are three 3D images, two with the yellow focus squares showing simple 3D shapes and one with the star field as an animated 3D image.