eateTexture2D(app.width, app.height, { 
            interalFormat: PicoGL.RG16
        });
        let depthTarget = app.createRenderbuffer(app.width, app.height, PicoGL.DEPTH_COMPONENT16);
        let framebuffer = app.createFramebuffer()
        .colorTarget(0, colorTarget)
        .colorTarget(1, velocityTarget)
        .depthTarget(depthTarget);

        // SET UP GEOMETRY
        let sphere = utils.createSphere({radius: 0.2})
        let positions = app.createVertexBuffer(PicoGL.FLOAT, 3, sphere.positi