Shared2018-09-13-172914.sagewsOpen in CoCalc
Example
from sage.plot.plot3d.shapes import *
def f(x,y):
    return 25-x^2-y^2

def g(x,y):
    return 16

P = plot3d(f,(-4,4),(-4,4), adaptive=True, color=rainbow(60, 'rgbtuple'), max_bend=.1, max_depth=15)
P += plot3d(g,(-5,5),(-5,5), adaptive=True, color='green', max_bend=.1, max_depth=15)
P.show()
3D rendering not yet implemented