Threshold adjustment layer / clipping mask not working correctly in CS6

Started Jan 19, 2013 | Discussions thread
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Jack A. Zucker
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Threshold adjustment layer / clipping mask not working correctly in CS6
Jan 19, 2013

This is a repeatable problem with images from my canon 5d, 8 bit adobeRGB.

What i've been doing is adding a layer of noise and then using a threshold adjustment layer and a clipping mask on the threshold layer. I then adjust the threshold until I get the level of dots/noise that I want. So far so good. However, if I then save the image and view it in lightroom or render the image, I get a different level of noise then what I'm seeing in photoshop even using "actual pixels" and rendering at full size.

Very odd.

The other thing I notice is that if instead of using a clipped adjustment layer, if I instead apply the threshold layer directly to the noise layer, the preview looks *TOTALLY* different than the result when I press OK.

Canon EOS 5D
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