                 this.ctxSubdivided.save();
                    this.ctxSubdivided.scale(this.devicePixelRatio, this.devicePixelRatio);
                    this._renderSubdividedPatchesRecursive(this.ctxSubdivided, this.mainPatch, 0, this.currentSubdivisionLevel, 0, 0);
                    this.ctxSubdivided.restore();
                }

                if (this.showSubdividedView && this.canvasFilled) {
                    this.ctxFilled.clearRect(0,0, this.canvasFilled.width, this.canvasFilled.height);
  