@Deltakosh while it’s understandable you want to avoid external dependencies, the kind of observables implemented by RxJS is the one that’s probably going to be included in browsers in a couple of years (Observable). But since that is future talk, I would still really appreciate a small chapter in the documentation on wrapping Babylon observables, i.e. not much more than just the bit @cybedred posted, just to make this more discoverable. Thanks!