Don't modify the THREE object

[AndrewRayCode]

You shouldn't modify the THREE object passed in. As in don't do this:

THREE.OBJLoader = function...

A better pattern is to get a reference to THREE however you prefer (either as a peerDependency or force user to pass it), and use it as needed. This is the path taken by three-subdivision-modifier and three-orbit-controls

Modifying objects passed to you, especially ones that represent other libs, can be dangerous.