This shawl is a crocheted optical illusion. It is striped using two different balls of yarn, but as the main color of each yarn is the same the stripes are hidden and only the wandering accent colors stand out.
The shawl is crocheted with slip stitches. The pattern comes with photo tutorials for all stitches and techniques used, i.e.
front loop only slip stitch (F)
inverse back loop only slip stitch (iB)
crocheting into the back bar of the starting chain
wide seed stitch (and how to read your stitches)
I also explain how the planned pooling in this pattern works.
Thanks to Jasmin Haupt for modeling!
The pattern is available in English and in German.