csg_ellipsoid(x = 0, y = 0, z = 0, axes = c(0.5, 1, 0.5))

#Generate a basic ellipsoid:
generate_ground(material=diffuse(checkercolor="grey20")) %>% 
  add_object(csg_object(csg_ellipsoid(),material=glossy(color="red"))) %>% 
  render_scene(clamp_value=10,fov=20)
  
#Three different ellipsoids:
generate_ground(material=diffuse(checkercolor="grey20")) %>% 
 add_object(csg_object(csg_group(list(
   csg_ellipsoid(x=-1.2, axes = c(0.2,0.5,0.5)),
   csg_ellipsoid(x=0, axes = c(0.5,0.2,0.5)),
   csg_ellipsoid(x=1.2, axes = c(0.5,0.5,0.2)))),
   material=glossy(color="red"))) %>% 
 render_scene(clamp_value=10,fov=20,lookfrom=c(0,5,10))
 
#Generate a glass ellipsoid:
generate_ground(material=diffuse(checkercolor="grey20")) %>% 
  add_object(csg_object(csg_ellipsoid(),material=dielectric(attenuation = c(1,1,0.3)))) %>% 
  render_scene(clamp_value=10,fov=20)
  
#Generate a glass ellipsoid in a Cornell box:
generate_cornell() %>% 
  add_object(csg_object(csg_ellipsoid(x=555/2,y=555/2,z=555/2,axes=c(100,150,200)),
    material=dielectric(attenuation = c(1,0.3,1)/200))) %>% 
  render_scene(clamp_value=10)