an A,B & C input that relates to vertex indices. If had a 1 dimensional point grid (as you do) with 10 U and 10 V, the A,B,C input needs to have a list pattern of '3 index value' paths (e.g.) {0,1,10},{1,11,10},{1,2,11}...
definition showing a 3 count point list, 1 face, 1 mesh object.…