Related Tutorial: Restore Missing Filters in Photoshop CS6
The options for the Diffuse Glow filter appear along the right of the Filter Gallery, and there’s three options we can set. The first is Graininess, which adds a grain effect (you probably figured that one out). I’m going to set my Graininess value to 6 but as with each of these options, feel free to experiment on your own and see what you think works best.
The second option, Glow Amount, controls the intensity of the glow. I’ll set mine to 10. Finally, Clear Amountbehaves like the opposite to