Return-Path: Received: from mail-iy0-f169.google.com ([209.85.210.169] verified) by media-motion.tv (CommuniGate Pro SMTP 4.2.10) with ESMTP-TLS id 4615719 for AE-List@media-motion.tv; Fri, 03 Feb 2012 17:51:31 +0100 Received: by iagz16 with SMTP id z16so5754888iag.28 for ; Fri, 03 Feb 2012 08:57:24 -0800 (PST) MIME-Version: 1.0 Received: by 10.42.144.2 with SMTP id z2mr7482382icu.18.1328288243985; Fri, 03 Feb 2012 08:57:23 -0800 (PST) Received: by 10.50.156.193 with HTTP; Fri, 3 Feb 2012 08:57:23 -0800 (PST) In-Reply-To: References: Date: Fri, 3 Feb 2012 10:57:23 -0600 Message-ID: Subject: Re: [AE] Inverse a LUT? From: Brian Higgins To: After Effects Mail List Content-Type: multipart/alternative; boundary=90e6ba1efd30f12e6e04b81234fd --90e6ba1efd30f12e6e04b81234fd Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable As an addendum, all the DI guys and colorists I know generally don't mess with LUTs on the input end at all...they yank the image around until it looks the way they want. -b On Fri, Feb 3, 2012 at 10:55 AM, Brian Higgins wro= te: > If you're just using it as a one-light kinda thing while you comp, do you > really have to use an uber-accurate LUT? Why not just make a reversible = 1D > LUT that doesn't crush blacks or clip highlights? The "official" Arri > LogC2Video lut is a mild S-curve. I'd just make an adjustment/guide laye= r, > add a Curves effect, make an S-curve and go to town, then turn it off > before rendering. > > $.02, > Brian > > > -- > brian higgins | senior vfx artist > Sol Design > 312.706.5500 > higgins@soldesignfx.com > soldesignfx.com > > > > On Fri, Feb 3, 2012 at 10:25 AM, Byron Nash wrote: > >> It's a 3D LUT Simon. If I try to reverse it on the Arri site, it gives m= e >> a 1D LUT. But I haven't figured out how to utilize the 1D properly. It >> gives a LUT for each ISO I think. >> >> >> On Fri, Feb 3, 2012 at 4:29 AM, Simon Bj=F6rk w= rote: >> >>> Correct me if I'm wrong, but isn't the color operation done with a logC >>> to rec709 a 1D lut? >>> >>> >>> 2012/2/3 Brendan Bolles >>> >>>> On Feb 2, 2012, at 7:45 PM, Brian Maffitt wrote: >>>> >>>> > Curious if this problem will go away with digital projection? >>>> Eventually digital projectors should be able to represent any visible >>>> color, I should think. >>>> >>>> >>>> Any visible color, as in the entire gamut of the human eye? We're a >>>> long way off from that, I'm afraid. Projectors are still making image= s by >>>> shining red, green, and blue light up there, so that's a major constra= int. >>>> But you'd think they'd be able show everything we can see on a comput= er >>>> monitor at least. Maybe they can. >>>> >>>> Ironically, part of the forthcoming IIC/ACES standard is the "Referenc= e >>>> Rendering Transform", which is like a standardized film look. And lik= e >>>> other film looks, you can't get fully-saturated colors. Similarly, I >>>> worked on the most recent "A Christmas Carol" which is a completely di= gital >>>> film (including projection), and yet we still created a film look for = it. >>>> Somebody thinks that people still like that film look. But I assume = with >>>> digital projection you can opt out if you want. >>>> >>>> >>>> Brendan >>>> >>>> >>>> +---End of message---+ >>>> To unsubscribe send any message to >>>> >>> >>> >>> >>> -- >>> -------------------------------- >>> Stiller Studios >>> Liding=F6/Sweden >>> >>> Simon Bj=F6rk >>> Stiller Studios >>> +46 (0)8 555 23 560 >>> Ekholmsn=E4sv=E4gen 40, S-181 41 Liding=F6 >>> simon@stillerstudios.se >>> www.stillerstudios.se >>> >>> find us: >>> http://www.eniro.se/query?search_word=3Dstiller+studios&geo_area=3Dlidi= ng%F6&what=3Dall >>> >>> >>> >> > > > > --=20 brian higgins | senior vfx artist Sol Design 312.706.5500 higgins@soldesignfx.com soldesignfx.com --90e6ba1efd30f12e6e04b81234fd Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable As an addendum, all the DI guys and colorists I know generally don't me= ss with LUTs on the input end at all...they yank the image around until it = looks the way they want.=A0

-b

On= Fri, Feb 3, 2012 at 10:55 AM, Brian Higgins <higgins@soldesignfx.com> = wrote:
If you're just using it as a one-light k= inda thing while you comp, do you really have to use an uber-accurate LUT?= =A0 Why not just make a reversible 1D LUT that doesn't crush blacks or = clip highlights?=A0=A0 The "official" Arri LogC2Video lut is a mi= ld S-curve.=A0 I'd just make an adjustment/guide layer, add a Curves ef= fect, make an S-curve and go to town, then turn it off before rendering.
$.02,
Brian

--
= brian higgins | senior vfx artist
Sol =A0Design



On Fri, Feb 3, 2012 at 10:25 AM, Byron Nash <byronnash@gmail.com> wrote:
It's a 3D LUT Simon. If I try to reverse= it on the Arri site, it gives me a 1D LUT. But I haven't figured out h= ow to utilize the 1D properly. It gives a LUT for each ISO I think.=A0


On Fri, Feb 3, 2012 at 4:29 AM, Sim= on Bj=F6rk <simon@stillerstudios.se> wrote:
Correct me if I'm wrong, but isn't t= he color operation done with a logC to rec709 a 1D lut?


2012/2/3 Brendan Bolles &l= t;brendan@fnordw= are.com>
On Feb 2, 2012, at 7:45 PM, Brian Maffi= tt wrote:

> Curious if this problem will go away with digital projection? Eventual= ly digital projectors should be able to represent any visible color, I shou= ld think.


Any visible color, as in the entire gamut of the human eye? =A0We'= ;re a long way off from that, I'm afraid. =A0Projectors are still makin= g images by shining red, green, and blue light up there, so that's a ma= jor constraint. =A0But you'd think they'd be able show everything w= e can see on a computer monitor at least. =A0Maybe they can.

Ironically, part of the forthcoming IIC/ACES standard is the "Referenc= e Rendering Transform", which is like a standardized film look. =A0And= like other film looks, you can't get fully-saturated colors. =A0Simila= rly, I worked on the most recent "A Christmas Carol" which is a c= ompletely digital film (including projection), and yet we still created a f= ilm look for it. =A0Somebody thinks that people still like that film look. = =A0But I assume with digital projection you can opt out if you want.


Brendan


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



<= /div>--
--------------------------------
Stiller Studios
Liding= =F6/Sweden

Simon Bj=F6rk
Stiller Studios
+46 (= 0)8 555 23 560
Ekholmsn=E4sv=E4gen 40, S-181 41 Liding=F6
simon@stillers= tudios.se
www.stillerstudios.se

find us: http://www.eniro.se/query?search_word=3Dstiller+studios&= amp;geo_area=3Dliding%F6&what=3Dall






<= span style=3D"color:rgb(153,153,153)">



--
brian higgins | senior vfx artist=
Sol =A0Design



--90e6ba1efd30f12e6e04b81234fd--