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DPChallenge Forums >> Tips, Tricks, and Q&A >> Graduated ND plugin
Showing posts 1 - 4 of 4, (reverse)
09/12/2007 01:02:29 AM · #1
Hey there,

Just noticed this DQ image

' . substr('//images.dpchallenge.com/images_challenge/0-999/735/120/582018.jpg', strrpos('//images.dpchallenge.com/images_challenge/0-999/735/120/582018.jpg', '/') + 1) . '

from the recent Power challenge was DQ for using a 'Graduated ND plugin'

Can anyone explain what it means and or does?
09/12/2007 01:05:09 AM · #2
A graduated ND is a filter that is half dark and half clear with some graduation in the middle. It's typically used to darken skies. I assume they must have used a plug-in that creates the same effect, darkening some pixels but not others.
09/12/2007 01:07:31 AM · #3
"Graduated ND plugin is a selective effects filter. It doesn't apply to the entire image uniformly, but in a particular direction chosed by the user, thus isn't a global tone adjustment and illegal in Basic Editing."

That pretty much sums it up...

09/12/2007 01:29:31 AM · #4
Note that this plugin probably would be legal for Advanced editing challenges, and that you can achieve a similar effect by creating a graduated mask and applying a Curves or Levels adjustment layer through that.
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