I’m going to write a collide-and-slide collision detection system in Javascript with a fully functioning demo using THREE.js.  I’m writing here so I’ll actually do it.  This will take me time.  If I am very lucky and don’t get burned out immediately, I might have it done by March 1.  I’m putting everything else on hold while I work on this.  If I can make a general purpose collision detection system then my primary purpose for using BabylonJS will no longer be valid and I’ll probably rewrite Lyridia base on THREE.js.