Luminosity Channel Play (Blurs & sharpening)

[Jason B]

Duplicate background layer (Layer > Duplicate Layer).

 

[Jason B]

Change the layer mode to “Luminosity” by selecting it from the Blending mode drop down menu on the layer pallet.

 

[Jason B]

Activate the Background layer by clicking on it in the layer pallet.
Create a new layer (Layer > New > Layer).

 

[Jason B]

Name this layer “composite”. Click OK.

 

[Jason B]

Fill new layer with gray (Edit > Fill)

 

[Jason B]

...and then select 50% from the drop down menu).

 

[Jason B]

Duplicate the “composite” layer

 

[Jason B]

Name the layer “luminosity”. Click OK.

 

[Jason B]

Select “background copy” by clicking on it in the layer pallet.
Merge the “background copy” and the “luminosity” (Layer > Merge Down).

 

[Jason B]

Select “Luminosity” from the blending mode drop down menu.