a bit like this problem: http://forums.adobe.com/message/5078890
with the blockyness of the wings she painted,
my brushes are on pen pressure and transfer,it was working fine last week , and suddenly this, ive updated my graphics card, even though my previous was a good one, and still no change
I think we should consider the conversation about your problem here, R.S., as Caroline's problem seems to have to do with brushing color into her documents, vs. the display of documents.
Could you please open this image into Photoshop, grab the screen, then apply a severe curves adjustment to spread the captured levels out so they're easily seen?
When I open the image into Photoshop 13.0.1 or 13.1.2, capture the screen, then enhance the image as I have described, it looks like this:
No, the display of information with posterization, while it looks similar, really has nothing to do with the depositing of posterized data inside a document with a brush. It's possible Caroline has your problem as well, which is further confusing matters. Whether you have her problem remains to be seen. Do something similar to what she did and post a copy of the 16 bit PNG file here. I or others can verify whether the file has posterization in it.
By the way, if you're seeing the problem in not just Photoshop, how is reinstalling Photoshop going to help?
You might have a bad profile set up to describe your monitor... Sometimes Windows updates bring in bad profiles.
Or you might have a video card problem. You seem to have eliminated the monitor.
Any chance you've managed to get your display set to 16 bit colors mode (sometimes called "High Color" mode)? That's outdated as pretty much everyone uses 16 million colors, but many drivers still support it.
Possible sources of quantization like this: GPU/video card, DAC if using analog connection (VGA), display cable (not likely), display itself (defect or color conversion problem), display profile (correction LUT is bad).
PS. Apparently I type slower than Noel for this one.
The test image looks to have been rendered fine, the concentric rings are nice and even.
Now that you see the rings very plainly shown, when you look at the original dim gray version (without enhancement) do the rings look as evenly spaced as what you're seeing in the enhanced view?
I'm not seeing the problems you claim to be seeing, and in fact your own enhancement of your screen grab shows no abnormality. I'm not seeing anything more than I'd expect in your extremely enhanced desktop screen grab either.
That the problem doesn't seem to be in your screen buffer, but apparently on your monitor screen, so I'd suggest trying a new cable, monitor, and possibly video card.
Assuming you're not just seeing the normal slight visibility of posterization on a good monitor showing 24 bit color, I believe you must be seeing something that others don't ONLY ON YOUR DISPLAY. It's clearly not coming through in your screen grabs, which don't show anything wrong. You're apparently looking at your own screen grabs with the same monitor and thinking you've captured the problem.
Your Curves-enhanced Windows background just shows the normal level transitions you see in 8 bits/channel imagery and whatever artifacts the image preparers left in the image. I see the same thing when I do roughly the same Curves operation you did to the Windows 8 desktop background. There is no indication of a problem in this whatsoever.
There is no systemic problem - though you may have a problem with your specific system. As has already been said, you most likely a problem with your video card or monitor. You need to replace things until it works right.
Only other thing I can suggest to further get folks to understand what you're really seeing, since the screenshots are doing nothing, is taking a high quality photograph of what you're actually seeing on your monitor.
1. Set your brush spacing smaller to paint more smoothly.
2 & 3: It proves nothiing to show the posterization in an 8 bits/channel image that's been brought out by extreme enhancement using a strong Curves operation. Everyone sees that. This is why if you need to do extreme operations on image data it's suggested you work in 16 bits/channel.
Even at 1px its rough. It was never like this before. I'm mot sure you understand the problem. those rips are there even with out enhancements
And I paint on a regular basis. So it deff is a similar prob to Carolina.
Thank you for your help but this is going round in circles .
well I don't see why it would change all of a sudden. Like I said I paint all the tome and this is not normal. And there is no documented fix. A few people have claimed to get this problem and the same answer is given which doesn't fix the problem. I'm going to keep looking and if I find fix I'll let you know.