How to change level in Alpha Channel ?

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  04 April 2012
Question How to change level in Alpha Channel ?


I am loading an .exr file which contains also alpha information.
In Photoshop it's easy to change the levels of an channel - I simple click the channels tab, go to my channel I want to change and make my color, levels adjustments.

But how can I make those edits on the alpha channel, or any other channel inside fusion ?

  04 April 2012
thats very easy:
if you use a colorcorrector, go to the tab with the little nuklear sign on it. then untick R,G,B and only leave A active. this means all your changes just go onto the alphachannel and dont affect RGB.
the colorcorrector has also a levels tab, where you can adjust the levels like in PS.

if you use the Brigthness/Contrast node, its even easier. there are the controls on which channel you work on the main tab.

if you use the colorcurves node there you have a seperate curve for R,G,B and A

Last edited by pingking : 04 April 2012 at 07:06 PM.
  04 April 2012
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