Scrubbed Wall Effect

Photoshop Tutorial

Open your image. Press control+j to duplicate the layer.

We will use crystalize filter Go to filter>Pixelate>Crystalize and give the value as shown:-

Image after applying Crystalize filter.

Go to image>adjustment>Threshold and give these values:-

Image after applying threshold filter.

Change the layer mode to Screen. You now have a scrubbed wall image effect :)