Fix https://forum.babylonjs.com/t/billboardmode-on-a-gltf-assets-doesnt-works-as-it-should/1999
Fix https://forum.babylonjs.com/t/billboardmode-on-a-gltf-assets-doesnt-works-as-it-should/1999

RaananW/Babylon.js,sebavan/Babylon.js,RaananW/Babylon.js,BabylonJS/Babylon.js,Kesshi/Babylon.js,BabylonJS/Babylon.js,NicolasBuecher/Babylon.js,sebavan/Babylon.js,sebavan/Babylon.js,jbousquie/Babylon.js,Kesshi/Babylon.js,jbousquie/Babylon.js,Kesshi/Babylon.js,NicolasBuecher/Babylon.js,NicolasBuecher/Babylon.js,jbousquie/Babylon.js,RaananW/Babylon.js,BabylonJS/Babylon.js