Once you’ve blurred the ellipse, cut the top half away from the divider by using the Rectangular Marquee Tool and deleting the area beneath it so that you are left with half an ellipse.
然后使用矩形选框工具删掉分割线上半部分，这样就剩下了半个椭圆。
2
Look at the top left of the image to see how precise the cut out is on the detailed feathers. Try that with the pen tool!