From: "Chris Zwar" <AE-List@media-motion.tv>
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Subject: Re: [AE] Best plugin to normalise z depths
Date: Thu, 9 Aug 2018 16:43:06 +1000
References: <list-7130210@media-motion.tv>
To: After Effects Mail List <AE-List@media-motion.tv>
In-Reply-To: <list-7130210@media-motion.tv>
Message-Id: <5F6FCFCD-070C-4DC4-92BE-A670B7504FB9@chriszwar.com>

Well chalk this up as a weird one, but now the exposure plugin is giving =
me +/- 100 stops, which is much better.  Don=E2=80=99t know where the 10 =
stop limit came from?  Anyway the combination of exposure & levels is =
doing what I need to do, it=E2=80=99s just an eyeball thing anyway, but =
if there is a better way to do it then I=E2=80=99d still like to know.

> On 9 Aug 2018, at 4:27 pm, Chris Zwar <AE-List@media-motion.tv> wrote:
>=20
> No, I=E2=80=99m not sure what=E2=80=99s going on there.  By default =
it=E2=80=99s not 32 bit, unless you click a checkbox to use a legacy =
version.  Then it has a range of +/- 150, which doesn=E2=80=99t make a =
dent in these frames.  Just for fun I applied 50 copies of the effect =
all at -150 and still no joy.
>=20
> Shame that a lot of the Channel plugins are still 8 bit only...
>=20
>> On 9 Aug 2018, at 4:21 pm, Timothy Sassoon <AE-List@media-motion.tv> =
wrote:
>>=20
>> Is Brightness/contrast 32-bit clean? I would presume so. Brightness =
has the virtue of moving all values equally, no companding.
>>=20
>> Tim
>> On Aug 8, 2018, 11:16 PM -0700, Chris Zwar <AE-List@media-motion.tv>, =
wrote:
>>> Hi all,
>>>=20
>>> I=E2=80=99m currently working on a project where frames are supplied =
as multichannel exrs. I=E2=80=99m working in 32bit float, linear space. =
The z-depth pass has raw values in it which are huge, I am normalising =
it in a precomp so I can see it, and tint it for fog/atmos effects. =
Currently I=E2=80=99m using the exposure effect to bring the values down =
into visible range, but as the exposure plugin has a limit of 10 stops =
sometimes I=E2=80=99m having to use 2 copies. Once I can see the image I =
use the levels effect to fine tune the blacks / whites.
>>>=20
>>> I=E2=80=99m wondering if there=E2=80=99s a better tool. I know AE is =
a bit lacking when it comes to 32 bit support, so is there a better way =
to bring these massive numbers down into a 0-1 range? Or is exposure / =
levels the best we=E2=80=99ve got to work with?
>>>=20
>>>=20
>>> -Chris
>>>=20
>>> PS. It=E2=80=99s not an option to change the way the z pass is =
rendered in 3D.
>>> +---End of message---+
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>=20
>=20
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