Gradient with dither creates artifacts beyond gradation

Photoshop CC / Mac (also occurs in CS6, I just never took the time to document it)
Create a gradient mask from 0 - 255, the mask contains a dot pattern in the area that extends beyond the gradation and should be a solid 0,0,0. The dot/pattern has a value of 1,1,1. The gradient was created with in the blue guides (see screen grab) with dither on. The dither is expected within that range but not beyond the gradation. I have tried with and without the "use Graphics Processor" checked.
To test this it's easiest to see against a transparent background, and enhancing with levels.
Is this a known feature

(sorry for the delay, I just found this report on someone else's bug list)
This is the dither option for the gradient tool. You just did an extreme adjustment so the 1/255 dither pattern (1 bit) becomes visible. The same would happen if you did a color conversion with dithering enabled - there would be 1 bit differences even in flat colored areas because a high precision color value was dithered down to an 8 bit color value. You can see a similar issue in 16 bit/channel - but it requires an even more extreme adjustment to see the lower bit.
That is normal, and has been there since the gradient tool was written (or at least as far back as our source database goes, but photoshop 1.0 didn't have dithering on the gradient tool).
If you do not wish to see the 1 bit dithering pattern, then you can disable dithering for the gradient tool.
Now, the fact that it is a pattern -- that is something we might work on. It's using a fixed noise table with offsets, and the offsets sometimes form a pattern for certain image sizes (that are close to multiples of the prime factors used in building and iterating the table). I have ways to make it more random, but it'll take a good chunk of time to code up and test.

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http://theebom.com/picturehost/gradient-fine.jpg
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http://theebom.com/picturehost/gradient-broken.jpg
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You cannot configure a web redirect with another security than none or a pre-shared key on layer2.
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===
Don't forget to rate answers that you find useful

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Hello Daniel,
The PCI serial cards are not supported with LabVIEW RT for ETS targets and are not expected to work. We are looking into finding a way to add support for PCI serial devices in RT, but currently that support does not exist.
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Gradient with dither creates artifacts beyond gradation

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