Don't sweat the technique

[image error]Wooly Thoughts are a small online company who design and sell patterns for amazing optical illusion knitwear.

Some of these are for sweaters or scarfs that display well-known optical illusions such as café wall or the Necker cube illusions.

However, the company has also designed knitwear specific illusions that use raised stitches that involve two colours, one of which is only visible when viewed from the side.

This means that when seen from the correct angle, images jump out on what would...