Photoshop filter adds Starlight effect to night lighting

Final effect

1, copy the background layer.

2, duplicate the layer again, because the starlight is diagonal.

3, to the Copy 2 layer execution: filter > Blur > Motion blur, Parameters and effects as shown below.

4. Change the blending mode of copy 2 to "lighten", as shown below.

5, the background copy: filter > Blur > Dynamic blur, this angle is set to 45 degrees, distance of 21 unchanged, the effect of the following figure.

6, the background copy layer blending mode to "lighten", the effect of the following figure.

7, the background copy and background copy 2 layer merged, blending mode to "lighten."

8, to the merged layer execution: filter > Sharpening > USM Sharpening, parameters and effects as shown below.

9, the current layer of opacity to: 70%, the effect of the following figure.

10, add layer mask to current layer.

11, the mask filled with black, with a white brush to wipe out the starlight part, the following figure.

Final effect: