load("docdraw.mac");

docdraw("figures/draw_surface_hide",
	columns=2,
	gr3d(explicit(exp(sin(x)+cos(x^2)),x,-3,3,y,-3,3)),
	gr3d(surface_hide = true,
	explicit(exp(sin(x)+cos(x^2)),x,-3,3,y,-3,3))
)$