You might have seen so many variations of this illusion but this one is not a computer generated image and rather a real photo. Still, you will be able to see the illusion as perfectly as you have done always. If you look at the image, you can see the shimmering dots that are grey in color at the intersections of the white stripes. However, they are not really there. This is a classic illusion that never fails to amuse you be it in any form. If you have a same textured tiled surface anywhere you can even check it live with your naked eyes.