try this (convex only though so concave would need to split into convex then recombined after being wrapped individually)... -- creates a ray point along the edge fn getEdgeRay msh edg = ( ze = edg - 1; a = (mod ze 3) + 1; b = mod a 3; fverts = getface msh (ze/3 + 1); v0 = getvert msh fverts[a]; v1 = getvert msh fverts[b +…