Gaussian Blur...Gaussian Blur...
Smoothes the alpha channel using a Gaussian blur algorithm.
Use this filter to smooth transparent edges or create special effects.
Set the radius of the Gaussian blur, in pixels.
Range 0% to 250%, 0% means no blurring.
Allows you to apply the Gaussian blur to only the Alpha channel,
only the color channels or both.
You cannot disable both; if you try, the settings will not be
changed.