Direction of the SpotLightHelper - Questions - three.js forum
takahiro(John Smith) on Twitter: "@threejs_org I guess you should've put this screen shot. Three.js no longer displays revision number in the console! https://t.co/dERtVGJYiC" / Twitter
Threejs TypeScript : Spot Light - YouTube
THREE.js spotlight casting shadow with no object between the near plane and the receiver - Stack Overflow