Cesium low level textured quad

gistfile1.js

var viewer = new Cesium.Viewer('cesiumContainer');
var scene = viewer.scene;

var flatten = function(ar) {
  return [].concat.apply([], ar);
};

var extract = function(p) {
  return [p.x, p.y, p.z];
};

var pts = Cesium.Cartesian3.fromDegreesArray([
  0.0, 0.0,
  10.0, 10.0,
  10.0, 0.0,
  0.0, 0.0,
  0.0, 10.0,
  10.0, 10.0
]);

var ptsArray = new Float64Array(flatten(pts.map(extract)));
var boundingSphere = Cesium.BoundingSphere.fromPoints(pts);

var sts = new Float32Array([0.0, 0.0, 1.0, 1.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 1.0, 1.0]);
var normals = new Float32Array([0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0, 0.0, 1.0, 0.0]);

var instance = new Cesium.GeometryInstance({
  attributes: {
    color: Cesium.ColorGeometryInstanceAttribute.fromColor(new Cesium.Color(1.0, 1.0, 1.0, 1.0))
  },
  geometry: new Cesium.Geometry({
    attributes: {
      position: new Cesium.GeometryAttribute({
        componentDatatype: Cesium.ComponentDatatype.DOUBLE,
        componentsPerAttribute: 3,
        values: ptsArray,
        normalize: false
      }),
      st: new Cesium.GeometryAttribute({
        componentDatatype: Cesium.ComponentDatatype.FLOAT,
        componentsPerAttribute: 2,
        values: sts,
        normalize: false
      }),
      normal: new Cesium.GeometryAttribute({
        componentDatatype: Cesium.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: normals,
        normalize: false
      })
    },
    primitiveType: Cesium.PrimitiveType.TRIANGLES,
    boundingSphere: boundingSphere
  }),
  id: '' + Date.now()
});

var material = new Cesium.Material({
  fabric: {
    type: 'Image',
    uniforms: {
      image: '../images/Cesium_Logo_Color.jpg'
    }
  }
});

var appearance = new Cesium.MaterialAppearance({
  material: material,
  faceForward: true,
  flat: true
});

var primitive = new Cesium.Primitive({
  geometryInstances: [instance],
  appearance: appearance,
  asynchronous: false,
  compressVertices: false,
  cull: false,
  debugShowBoundingVolume: false,
  allowPicking: true
});

scene.primitives.add(primitive);