I'm a beginner with babylonjs. I'm trying to make a demo to see how it's work. Everything work fine with  "Bane, Batman, Penguin" sample But when i try to load the model downloaded from sketchfab.com it just not working properly. Here what i've got. What's happening? What am i missing? Here the entire code   // The first step is to get the reference of the canvas element from our HTML document: var canvas = document.getElementById('renderCanvas'); // Then,