Level surfaces of exp(xyz)

For two-variable functions, the level  sets {(x,y): c = f(x,y)} are curves in the plane. For three-variable functions, the level sets {(x,y,z): c = f(x,y,z)} are surfaces in three-space.  This surface show the level surfaces of exp(xyz) for c=0,1,2,3. It is designed and printed by Colin Chung, GMU Math Makerlab, inspired by a previous version designed by former student Anneliese Slaton which she wrote about on: http://gmumathmaker.blogspot.com/2016/04/level-sets.html