Black-Alpha

try this, it may work : https://threejs.org/docs/#api/renderers/WebGLRenderer.autoClear

When you say it wont work , what exactly do you mean? I can post a link to a 'working version' if you need let, let me know, I'm currently...

as is the project "may not work", you'll have to comment line 38 in planettest.cs : [ //testLight.gameObject.SetActive (false); ] and drag the light into 'Test Light' on the test...

I seems like your new to unity, you actually have to open the scene to view it, what you are looking at is a fresh new scene, (url)  if...