Step 14: Apply The "Wind" Filter Three Times

Go back up to the Filter menu once again, choose Stylize, and then choose Wind. When the Wind filter's dialog box appears, make sure Method is set to Wind and Direction is set to From the Right:

Click OK to apply the Wind filter once. Then press the keyboard shortcut Ctrl+F (Win) / Command+F (Mac) twice to apply the same filter two more times.

Step 15: Invert The Image Again

Press Ctrl+I (Win) / Command+I (Mac) to invert the image once again:

Step 16: Apply The "Wind" Filter Three More Times

With the image inverted, press the keyboard shortcut Ctrl+F (Win) / Command+F (Mac) three more times to apply the filter to the image three more times:

Step 17: Brighten The Image Again With Levels

We need to brighten the image again using Levels, but this time, we'll let Photoshop do the work for us by using Auto Levels. To do that, press Shift+Ctrl+L (Win) / Shift+Command+L (Mac) to apply the Auto Levels command to the image, which will brighten it up:

Step 18: Rotate The Canvas 90 Degrees Counterclockwise

Go back up to the Image menu at this point, choose Rotate Canvas once again, and this time choose 90° CCW to rotate the canvas back to the way it was originally: