I believe it was a Spoonflower contest that spurred me to redo a tessellation I had done by hand in the 90s. I had accomplished this one in symmetry group Cmm, built within a 30-60-90 degree triangle, with mirrors on two sides and a two-way rotation point on the hypotenuse.
Lai Tsi was an Eckankar Master from ancient China. He is easily recognized by his pointy little red hat. That is exactly what happened while I was sketching, tweaking a line in KaleidoPaint. Once I see a possibility, I run with it. Go with the flow, follow the hints and I will eventually find a way. A long process of give and take so that both sides are happy.