17, Derived points in Lilac.

Derived points in lilac. These points at the back and front of the elbows and knees relate to the rotational kinetics of the elbow and knee. On the fabric, they become visualised as creases at the front and as break points at the back of the elbow and knee while the forearm or shin is bending. These points serve as indications of where to direct cuts if constructing bent sleeves or legs.