lementById("gl-canvas");
        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;

        let app = PicoGL.createApp(canvas)
        .clearColor(0.0, 0.0, 0.0, 1.0)
        .enable(PicoGL.DEPTH_TEST)
        .depthFunc(PicoGL.LEQUAL)
        .blendFunc(PicoGL.ONE, PicoGL.ONE);

        let timer = app.createTimer();

        // SET UP GBUFFER PROGRAM
        let geoVsSource =  document.getElementById("geo-vs").text;
        let geoFsSource =  document.getElementById("geo-fs").t