Photoshop cc 2020 gradient banding

[HeadB0t]

Hi, I don't really know if it's banding but it's looking like banding ... 
tried adding noise, 16bit and all of these methods but it didn't work 
I don't really know if there's any problem with my monitor, my friend tried to help me but still, nothing worked .. got 3 examples for the banding I'm getting.

[silk-m]

Hi,

Is the monitor currently in use 8bit / ch? In that case, banding of that degree is inevitable, but if you check Dither and apply gradation, it will become less noticeable.
If you want to avoid banding on the monitor display, use hardware that can display at 10bit / ch or higher, and make the document 16bit / ch or higher.

[HeadB0t]

Yes, my monitor is using 8bit, I checked dither and it's on as you can see in the second picture and tried using 16bit, ill try to use 10bit hardware.
thanks :]

[D Fosse · Accepted solution]

Actually your third screenshot illustrates a particularly well-behaved 8-bit display system. If you open that screenshot in Photoshop and measure with the color picker, you get a perfectly regular series - 20/20/20 - 21/21/21 - 22/22/22 and so on all the way. Each step adds exactly one 8-bit value.

In other words, and as silk-m already pointed out, this is the banding you get with an 8-bit monitor/video card. This is the best case scenario. The reason you don't see banding in photographs is that they always contain just enough noise to break it up.

Worst case scenario is highly irregular banding with color banding on top because the three channels aren't in step.

Unfortunately you can't "try" 10-bit hardware unless you actually buy it. 10-bit capable monitors are generally expensive. You also need a 10-bit capable video card. Until recently that meant NVidia Quadro or AMD Radeon Pro. Recently, however, NVidia started supporting 10 bit for their standard GeForces as well, using the "studio" driver.

This is a very welcome development, because it should put pressure on all the vendors for a wider implementation of 10 bits. This is 2019 and we really shouldn't need to put up with 8 bit processing anywhere.

[vagn ebbek59985465]

 I have severe banding on pictures from my nerw 51 Mpx Fujifilm GFX 50S II. Attached picture part ar a part of total picture. To enhance/show the problem Saturation are set at +100. Pictrure are original uncompressed RAW  adjusted in 16 bit.      kier@kierphoto.com