Sorry but PG has errors.
It is really unclear what your project is trying to do. Please take a step back. How about if you generate a PG say 5 cubes all close to the origin with an arc rotate camera targeting (0, 0, 0) with a reasonable radius. All the JSON stuff and long distance viewing can be dealt with later. Let us know how you intend to interact with the cubes. What do you need the gizmo box for?