code: function () {
                  if (!this._emptyTexture) {
                      this._emptyTexture = this.createRawTexture(new Uint8Array(4), 1, 1, BABYLON.Engine.TEXTUREFORMAT_RGBA, false, false, BABYLON.Texture.NEAREST_SAMPLINGMODE);
                  }
                  return this._emptyTexture;
              }
docs: Empty texture