Now we'll add a dramatic glow to the tiles. Before we begin, zoom in to 100% so that you can see the individual tiles. Open the Filter> Blur menu and select Gaussian Blur. In the Gaussian Blur filter tool, adjust the radius so that the tiles create a soft glow effect.

We're done! But here's one more step in case you feel that the outline is too thin and you would like to thicken it. Open the Filter> Other menu and select Maximum. Adjust the radius slightly to increase the size of the outline. Click OK when done.




