In the process of creating rig of knee it dawned on me that the MuscleStrand lacks one important feature – the possibility of expanding the muscle when it is bent.
In the area of the joint there is multilayer structure of muscles, and while it is bending some muscles are contracting increasing in volume. Stratifying on each other, displacing and contracting muscles give visual effect of extension of adjustment tissue by knee and elbow joints.
It is hardly possibly to create anatomically right muscle structure using MuscleStrand. That’s why I have replaced the whole group of muscles by MuscleStrand object extending it if necessary.