Fix texture select functions not showing up in engine prototype
Fix texture select functions not showing up
in engine prototype

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