Fix defines used when creating the depth effect
Fix defines used when creating the depth effect

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