There are 16-20 cartilagines tracheales. Cartilagines occupy 2/3 to 3/4 of the circumference of the trachea. (not 1/2) Anyway this is great thread. Good luck!
thanks Joe, sad to hear.I assume thats pretty hard to implement.I cant think of a workarround or trick.Except 2 meshes with 2 materials and a smart blending.