If it wasn't mentioned there is a preference to turn on/off dithering in
the viewer under "Preferences > Viewer(Comp) > disable GPU Viewer dithering"

--
Deke Kincaid
Media & Entertainment OEM Development Manager
The Foundry
Skype: dekekincaid
Tel: (310) 399 4555 - Mobile: (310) 883 4313
Web: www.thefoundry.co.uk
Email: [email protected]

On Wed, Jan 14, 2015 at 10:48 AM, Howard Jones <[email protected]>
wrote:

> Ironically monitor at float creates banding, 8 bit doesn’t because 8 bit
> dithers but the others don’t.
> The dithering was added to avoid this sort of confusion because of (some)
> monitors being 8 bit.
>
> H
> On 14 Jan 2015, at 08:39, Adrian Cruceru <[email protected]> wrote:
>
> Hi J
>
> You did right, the sampler tool is what you need and unfortunately is
> looks like your monitor is picky :(
>
> A
>
> On Tue, Jan 13, 2015 at 11:58 PM, Jason P Nguyen <[email protected]>
> wrote:
>
>> Damn,  it might be the monitor.  Moved the viewer to my dell monitor and
>> it doesn't look banding at all.
>> Viewer pref is float.
>>
>> Hey Adrian,  which curve type in the curve tool do I need to sample,
>> intensity, exposure,  or Luma? They all just gave me rob numbers w/o the
>> visual curve. . I plugged the sampler node under the ramp instead,  and it
>> gave visual graph.  Looks smooth . . So I would say the monitor,  even on
>> client's side
>>
>> Thanks all.
>>
>> J
>> On Jan 13, 2015 3:49 PM, "Adrian Cruceru" <[email protected]>
>> wrote:
>>
>>> Sorry about the advice on the curve tool, you need the sampler instead,
>>> if will quickly show you if you have real banding in the actual data which
>>> is simply repeating pixels nothing more.
>>> You can test the sampler with a ramp and a posterize tool too see what
>>> banding will look like in  the analyzed curve
>>> Hope it helps
>>>
>>> Cheers
>>>
>>> Adrian
>>>
>>> On Tue, Jan 13, 2015 at 11:34 PM, chris <[email protected]> wrote:
>>>
>>>> On 1/13/15 at 11:23 PM, [email protected] (Jason P Nguyen) wrote:
>>>>
>>>>> The client also saw the banding from the grad i had on a sky.
>>>>>
>>>>
>>>> hmm, are you seeing banding in the ramp/mask falloff or in the sky?
>>>>
>>>> if it's only in the sky it could well be an issue with the footage
>>>> (8bit and/or compressed).  if you see it in the alpha itself then most
>>>> likely a screen issue, but as others have said, plotting a curve is a good
>>>> way to make sure.
>>>>
>>>> chris
>>>>
>>>>
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>>>
>>>
>>>
>>> --
>>> Adrian Cruceru
>>> df(x)
>>>
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>>
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>
>
>
> --
> Adrian Cruceru
> df(x)
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