In this mini-tutorial you’ll learn, step by step, how to smooth a selection using the Quick cutout tool.
First, open Tools and Properties windows (Windows->Tools and Windows->Properties), then select the Quick cutout tool (keyboard shortcut: X) from Tools window. Properties window automatically updates its content.

Into Properties window there is a slider titled “Smooth Selection”. Moving its indicator from left to right will increase smooth level (N). Viceversa, moving it from right to left will decrease the value (B).
You can use the check button on the right to enable (disable) the smooth (CTRL + SHIFT + B).
Enabling this feature you will be able to improve your cutout, specially when the generated RealEdges are particularly jagged.
This is a selection with smooth disabled:

This is a selection with smooth enabled and setted to 30 pixels:

Posted by Alessandro Cocco
Posted by digipeeks
Posted by pamelaf 


