…cached

Example program:

import ipyvolume as ipv
import numpy as np

def scene():
    f = ipv.figure(debug=True)
    ipv.xyzlim(-1, 1)
    x = np.array([0.1, 0.5], dtype=np.float32)
    ipv.material_lambert()
    s = ipv.scatter(x, x, x, marker="sphere", size=10);
    ipv.material_clear()
    k = ipv.examples.klein_bottle(show=False)
    ipv.xyzlim(2)
    ipv.material_phong()
    ipv.material_clear()
    m = ipv.plot_plane('bottom')
    ipv.show()
    return f
f = scene()
ipv.light_ambient(intensity=0.4)
ipv.light_directional(position=[-3, 10, 3]);

The klein_bottle would not cast a shadown, unless we modify alphaTest

This appears black if alphaTest for mesh is changed to != 0.5