1load("docdraw.mac");
2docdraw3d("figures/draw_interpolate_color4",
3	enhanced3d = true,
4	mesh([[1,1,3],
5	[7,3,1],[12,-2,4],[15,0,5]],
6	[[2,7,8],
7	[4,3,1],[10,5,8], [12,7,1]],
8	[[-2,11,10],[6,9,5],[6,15,1], [20,15,2]])
9)$
10