     },
                initialMatrices: [
                  new THREE.Matrix4().makeTranslation(0,-2, 0),
                  new THREE.Matrix4().makeRotationY(Math.PI/2)
                ]
              }
            }, {
              type: ParticleSaga.ImageTarget,
              url: './images/saga.png',
              container: document.getElementById('multitarget-reference-3')
            }, {
              type: ParticleSaga.ImageTarget,
              url: './images/griffin.png',
              container