How to make an illusion image in which colors are attached to black-and-white photos at an unprecedented level

This image, one of which is painted with color which is not understood, another one is a black and white photograph.

However, after looking at the painted image for a while, looking at black and white photos, black and white photos become color photographs. It also makes a color photograph at an amazing level beyond imagination. I will be shocked for a moment.

Details of the procedure to experience are as follows.
First go to the site below.

Big Spanish Castle

Move the mouse over the image. Then a black and white image comes out. Color is not attached. Next, move the mouse over the image and stare at the colored image for 30 seconds. It is effective to staring at the black point in the center. Then, when you move the mouse over the image again, colors are added to the picture that should have been black and white. It will also be a complete color photograph.

There are things of this kind in the past, but it is rare that it will be densely colored so far. Of course the secret is in the making way. The way to make it is as follows.

Color Illusion Tutorial

An action file for Photoshop that reproduces the above procedure in one shot

The way of doing it is simple, but the effect is enormous.