The Pinch/Punch filter can be used either in small amounts to correct or enhance portraits, or in extreme amounts to create bizarre effects.
Pinch creates a concave spherical distortion (squeezes an area) and Punch creates convex spherical distortion (bulges an area).
About the Pinch/Punch filter
This filter can be applied as a non-destructive, live filter. It can be accessed via the Layer menu, from the New Live Filter Layer category.
Settings
The following settings can be adjusted in the filter dialog:
Pinch/Punch—sets the type and value of the distortion. Negative values give a pinch effect, positive values give a punch effect. Type directly in the text box or drag the slider to set the value.
Radius—controls intensity of the filter. Type directly in the text box or drag the slider to set the value.
