code: function (width, height) {
          if (this._gBufferTex1.width === width
              && this._gBufferTex1.height === height
          ) {
              return;
          }
          this._gBufferTex1.width = width;
          this._gBufferTex1.height = height;
  
          this._gBufferTex2.width = width;
          this._gBufferTex2.height = height;
  
          this._gBufferTex3.width = width;
          this._gBufferTex3.height = height;
  
          this._gBufferTex4.width = width;
          this._gBufferTex4.height = height;
      }
docs: Set G Buffer size.
  @param {number} width
  @param {number} height