I was looking at optical illusions when I came across "John Lennon optical illusion." See link below for the illusion.
I looked on the internet for a tutorial but couldn't find one. After playing around with Photoshop I came up with this Instructable.
Here is the finished file.
This can be done with a photo or text.
- A Photo
Step 1: Black and White lines
Make the size 4 px wide and 9 px long (image 1.)
Zoom in if needed to see.
Use the Single Column Marquee tool to select 1 column of px (image 2.)
Use the paint bucket tool to fill column. Follow the color scheme, black gray(9f9f9f) white gray(9f9f9f), as seen in image 3.
Define the pattern Edit / Define pattern (images 4 and 5.)