Tumblr user brilliantknitwit created this ingenious Dr. Who scarf featuring an image of the TARDIS in illusion knitting, so that it only appears when viewed from the proper angle. It’s almost as if it has its own “chameleon circuit.”

[via geek and nerd knits]

More:

• MAKE | The Illusion Knitting of Pat Ashforth and Steve Plummer
• MAKE | Hidden Pattern Knitting
• MAKE | HOW TO – Knit a Transformer washcloth