RT Nik Lever
#ThreeJS Tip 7:
If a loaded model is not visible it may be a scale problem. Get its minimum and maximum axis-aligned position using the Box3 class.
const bounds = new THREE.Box3();
bounds.setFromObject(object);
Line 56 in CodePen example.
https://codepen.io/nik-lever/pen/RwMraGG

https://twitter.com/NikLever/status/1544938042334580738