7. Switch over the Blur layer mask, making a click on its pictogram on the Layer’s palette. Otherwise we’ll fill the picture with black-and-white gradient. Represent with the mouse a line from the top to the bottom. The black and grey zones of the gradient open the parts of the sharp background’s layer.

8. The gradient may be repictured so many times as you wish. It’s worth to experiment with the gradient’s angles and its length to choose the appropriate position of the sharpness’s  thin line between those two blurred fragments of the foreground and of the background.





Experiment on!