This customer wanted a set of T-shirts for herself and her friends, with the photographs of her friends appearing similar to an Andy Warhol poster.
Effects like these can be made by playing with the colour channels, and filters using Photoshop. Here is one of the photographs we used to create the poster effect:
This is the Andy Warhol Poster which inspired our custom design:
Here’s how the sample design looked on a Hoodie, which we sent to our customer for approval: