From: "Roei Tzoref" Received: from mail-io0-f171.google.com ([209.85.223.171] verified) by media-motion.tv (CommuniGate Pro SMTP 6.1.0) with ESMTPS id 6433517 for AE-List@media-motion.tv; Tue, 10 Apr 2018 03:33:11 +0200 Received: by mail-io0-f171.google.com with SMTP id q84so11902647iod.10 for ; Mon, 09 Apr 2018 18:38:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=WaMAcpTLRLjWHx0uN6PLTfArQ8RqjNRsnkjQvIHb5o4=; b=OgnJHIyM7N5VI57C5Lgl04yFjN6cMvwKZGX46Hbg7nBarLZwJpZbx4fWu5zTXrwclO dVVWfdIG/0aktQUNSMJsDrjUEK5jaFq5BjKDnDsdRFrcqn71ZGQtRpQGksXAF44XGc6C 0Xcnn+374lDT/Wy4Zw3+v3rlfCJ0s8id5TYEOv11Us+fRAEtRlEcswPS6fOu18y9/v8K p5MMUme7R+JqjQn2igyGjuz696ZURdnwiJE4ke/zsIlsoMf79edZmEa2+juwFhyAAzUz QU574L1UD7BicmzSqXsk6ThrFFkwHyA3Rn6ptsLElqrLY6O5gZdZaxamPIeTz7fNjtrn krnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=WaMAcpTLRLjWHx0uN6PLTfArQ8RqjNRsnkjQvIHb5o4=; b=ISbCfWPdzggZy8aEwAgZqK0iRNO3GsSjAJn3nJJdnxBtx3F+mWHl9PlDbPfREB0jpM Tyi1S6XxySpfEltj0iZkk2pi2JLCAseOqVUJSW9rK11K4Z1SNW75HJZtNiSvsIHdYLtH 7yXesXOHQxFtdzvSnPPdqYHJDaEMqCOV0RKrFcEgxS/e8YS/C2FcqBTZ8wyrl6WCBbYF 6+8kmZ6hK/V1ysChFtFvkTZLVMorQws0tpsYf2raxDR48+inij0d12zOAsTsxeycRa/V rqFRZ97N07Y3aIstc2QfreMgwtgPrAn1lnkPN0eRLwt6SVr/zCwlM4UUrm2OgoqI9/fl srcw== X-Gm-Message-State: ALQs6tCz04yOsvsButUjAbkxJmS732CvBVbm27Ho6dXvf4TuvQIS5QT1 dQoz6cjWh/NZmXfljPkRx2mLviQsOOADJA6Ns2G9CQ== X-Google-Smtp-Source: AIpwx493H7yGTK0DyO1hlb76wbrr7VOxongeHnB3SuiCxeCf0O9mUN/TDyFdL4wadFox4In1qP3PVElb0BQoSCvz2Q0= X-Received: by 10.107.147.198 with SMTP id v189mr1139766iod.282.1523324307649; Mon, 09 Apr 2018 18:38:27 -0700 (PDT) MIME-Version: 1.0 Received: by 10.2.59.96 with HTTP; Mon, 9 Apr 2018 18:37:47 -0700 (PDT) In-Reply-To: References: Date: Tue, 10 Apr 2018 04:37:47 +0300 Message-ID: Subject: Re: [AE] Unmult? To: After Effects Mail List Content-Type: multipart/alternative; boundary="94eb2c0560a83c391e05697494c8" --94eb2c0560a83c391e05697494c8 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Thanks Chris, I have watched your tutorial a while back. this does not solve the problem with Ae's unmult though... as I mentioned, Ae's Unmult preset, which simply does 2 things: Shift Channels with take alpha from lightness + remove color matting, is not a good tool for unmulting since it has a discoloring after effect which AFAIK cannot be avoided. a simple test confirms this. examples here: https://imgur.com/a/JoTb0 AFAIK, the only way to unmult accurately in Ae is to use any of these 3rd party plugins: Knoll Unmult, mekajik Unmult, VC Color Vibrance On Tue, Apr 10, 2018 at 4:03 AM, Chris Zwar wrote= : > Actually it=E2=80=99s the opposite. If you simply copy the lightness int= o the > alpha then the RGB is preserved entirely, but this isn=E2=80=99t accurate= . You > need to use the remove colour matting plugin as well, which then takes th= e > background colour into account and adjusts everything accordingly. > > This video demonstrates what the remove colour matting plugin does and wh= y > it=E2=80=99s important: > > https://www.provideocoalition.com/alpha-channels-good-bad-ugly/ > > > On 10 Apr 2018, at 10:57 am, Roei Tzoref wrote: > > Ae's Umult - Alpha from Lightness (Unmult) preset) unfortunately is not > optimal since it has a discoloring result. it does not preserve the RGB > information in it's entirety. I have seen not any way in Ae to unmult > natively without this discoloring effect. a simple test is taking a black > solid, adding a lens flare effect, then trying to unmult. > > another free option exists in the VC Color Vibrance plugin which is free > by video copilot: > https://www.videocopilot.net/blog/2016/02/color-vibrance-update-v1-06/ > > simply change the color to 0 to have no effect in color, and change "matt= e > alpha" to "on" > > > > On Tue, Apr 10, 2018 at 1:47 AM, Stephen van Vuuren < > AE-List@media-motion.tv> wrote: > >> And if you want to mess around with more creative kind of options, Brian >> Moffit eons ago suggested a Shift Channels (Take Alpha from Luminance) a= nd >> muck about the a levels effect to boost/lower alpha to taste. >> >> -----Original Message----- >> From: After Effects Mail List >> Sent: Monday, April 9, 2018 6:04 PM >> To: After Effects Mail List >> Subject: Re: [AE] Unmult? >> >> It=E2=80=99s not THAT cumbersome to do with standard AE tools=E2=80=A6 f= irst you use the >> channel combiner, set the first option to Max RGB and the second to >> Lightness. Then use the =E2=80=9Cremove colour matting=E2=80=9D plugin. = The combination of >> those two effects is the same as unmult. >> >> > On 9 Apr 2018, at 11:43 pm, Byron Nash wrote= : >> > >> > Looks like Red Giant put their unmult effect into legacy status and >> they have one in Universe now? What's the current pulse on which unmult >> effect to use? Is there another option these days? >> >> >> +---End of message---+ >> To unsubscribe send any message to >> >> +---End of message---+ >> To unsubscribe send any message to >> > > > --94eb2c0560a83c391e05697494c8 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Thanks Chris, I have watched your tutorial a while ba= ck. this does not solve the problem with Ae's unmult though...
as I mentioned, Ae's Unmult preset, = which simply does 2 things: Shift Channels with take alpha from lightness += remove color matting, is not a good tool for unmulting since it has a disc= oloring after effect which AFAIK cannot be avoided.

a simple test confirms this.=C2=A0examples here:
https://imgur.com/a/JoTb0

AFAIK, the only way t= o unmult accurately in Ae is to use any of these 3rd party plugins: Knoll U= nmult,=C2=A0mekajik Unmult, VC Color Vibrance


On= Tue, Apr 10, 2018 at 4:03 AM, Chris Zwar <AE-List@media-motion.tv> wrote:
Actually it=E2=80=99s the oppo= site.=C2=A0 If you simply copy the lightness into the alpha then the RGB is= preserved entirely, but this isn=E2=80=99t accurate.=C2=A0 You need to use= the remove colour matting plugin as well, which then takes the background = colour into account and adjusts everything accordingly.

= This video demonstrates what the remove colour matting plugin does and why = it=E2=80=99s important:

https:/= /www.provideocoalition.com/alpha-channels-good-bad-ugly/


On 10 Apr 2018, at 10:57 am, Roei Tzoref <AE-List@media-motion.tv> wro= te:

=
Ae's Umult - Alpha from Lightness (Unmult) preset) unf= ortunately is not optimal since it has a discoloring result. it does not pr= eserve the RGB information in it's entirety. I have seen not any way in= Ae to unmult natively without this discoloring effect. a simple test is ta= king a black solid, adding a lens flare effect, then trying to unmult.=C2= =A0

another free option exists in the VC Color Vibrance = plugin which is free by video copilot:=C2=A0

simply change the color to 0 t= o have no effect in color, and change "matte alpha" to "on&q= uot;


On Tue, Apr 10, 2018 at 1:47 AM, Stephen van V= uuren <AE-List@media-motion.tv> wrote:
And if you want to mess around with more creative kind o= f options, Brian Moffit eons ago suggested a Shift Channels (Take Alpha fro= m Luminance) and muck about the a levels effect to boost/lower alpha to tas= te.

-----Original Message-----
From: After Effects Mail List <AE-List@media-motion.tv>
Sent: Monday, April 9, 2018 6:04 PM
To: After Effects Mail List <AE-List@media-motion.tv>
Subject: Re: [AE] Unmult?

It=E2=80=99s not THAT cumbersome to do with standard AE tools=E2=80=A6 firs= t you use the channel combiner, set the first option to Max RGB and the sec= ond to Lightness. Then use the =E2=80=9Cremove colour matting=E2=80=9D plug= in.=C2=A0 The combination of those two effects is the same as unmult.

> On 9 Apr 2018, at 11:43 pm, Byron Nash <AE-List@media-motion.tv> wrote: >
> Looks like Red Giant put their unmult effect into legacy status and th= ey have one in Universe now? What's the current pulse on which unmult e= ffect to use? Is there another option these days?


+---End of message---+
To unsubscribe send any message to <ae-list-off@media-motion.tv>

+---End of message---+
To unsubscribe send any message to <ae-list-off@media-motion.tv>


--94eb2c0560a83c391e05697494c8--