Add an Object3D object to the Group.
group.add(o[, ...]);
A variable argument list of Object3D instances.
Add a moon and a box models to the group. Taken from [lesson 12]http://uber.github.io/luma.gl/examples/lessons/12/). http://uber.github.io/luma.gl/examples/lessons/12/
// Add objects to the group
group.add(moon, box);Removes an Object3D object from the Group.
group.remove(model);
model - (object) The model to be removed.
Add a moon and a box models to the group. Then remove them.
// Add objects to the group
group.add(moon, box);
// Remove the moon
group.remove(moon);