               fn : function (context, props) {
                            return mat4.multiply([], props['projViewMatrix'], props['modelMatrix']);
                        }
                    },
                    'projViewMatrix',
                    'uPickingId',
                    'positionMatrix'
                ]
            },
            pickingFBO
        );
        const uniforms = {
            halton: [0.2107, -0.0202],
            globalTexSize: [canvas.width, canvas.height],
            li