HOW TO CREATE AN INFINITE FEEDBACK LOOP IN PHOTOSHOP
In photography, you can display a camera’s image on a monitor and point the camera at the monitor to create an infinite feedback loop.
There is a simple way to create this effect in PhotoShop.
Let me illustrate this by showing how I created the image for this post.
I began with a simple image in PhotoShop, consisting of a background image, a foreground image, a tablet, and a line of text.
I saved this as a PhotoShop file in PSD format and then created a PNG image of it as well.
Next, I opened the PNG file and resized it to match the screen size of the tablet.
In my version of PhotoShop (I have the Creative Cloud), I used Select > All and Edit > Copy to copy the image, and then I switched windows to my PSD file. I used Edit > Paste to insert the PNG image into the PSD file, and positioned it to fit on the screen.
My original image was 1024 pixels wide. The tablet’s screen size in the original image is 340 pixels wide. The ratio is 0.332.
Multiply 340 by 0.332 to get 113. The next PNG image needs to be scaled to 113 pixels wide. Copy and paste that image into the PSD file to add another loop to the picture.
Repeat these steps (multiplying by the same ratio; in my example, the ratio is 0.332) until you can’t tell with your eye that the feedback loop isn’t ‘infinite.’
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Chris McMullen, Author of A Detailed Guide to Self-Publishing with Amazon and Other Online Booksellers
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