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 4615717 for AE-List@media-motion.tv; Fri, 03 Feb 2012 17:49:37 +0100 Received: by iagz16 with SMTP id z16so5752267iag.28 for ; Fri, 03 Feb 2012 08:55:30 -0800 (PST) MIME-Version: 1.0 Received: by 10.42.144.2 with SMTP id z2mr7474138icu.18.1328288128537; Fri, 03 Feb 2012 08:55:28 -0800 (PST) Received: by 10.50.156.193 with HTTP; Fri, 3 Feb 2012 08:55:28 -0800 (PST) In-Reply-To: References: Date: Fri, 3 Feb 2012 10:55:28 -0600 Message-ID: Subject: Re: [AE] Inverse a LUT? From: Brian Higgins To: After Effects Mail List Content-Type: multipart/alternative; boundary=90e6ba1efd300f92b604b8122e66 --90e6ba1efd300f92b604b8122e66 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable 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 layer, add a Curves effect, make an S-curve and go to town, then turn it off before rendering. $.02, Brian --=20 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 me > 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 wr= ote: > >> 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 images= by >>> shining red, green, and blue light up there, so that's a major constrai= nt. >>> But you'd think they'd be able show everything we can see on a compute= r >>> monitor at least. Maybe they can. >>> >>> Ironically, part of the forthcoming IIC/ACES standard is the "Reference >>> Rendering Transform", which is like a standardized film look. And like >>> other film looks, you can't get fully-saturated colors. Similarly, I >>> worked on the most recent "A Christmas Carol" which is a completely dig= ital >>> film (including projection), and yet we still created a film look for i= t. >>> Somebody thinks that people still like that film look. But I assume w= ith >>> 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=3Dlidin= g%F6&what=3Dall >> >> >> > --90e6ba1efd300f92b604b8122e66 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable If you're just using it as a one-light kinda thing while you comp, do y= ou really have to use an uber-accurate LUT?=A0 Why not just make a reversib= le 1D LUT that doesn't crush blacks or clip highlights?=A0=A0 The "= ;official" Arri LogC2Video lut is a mild S-curve.=A0 I'd just make= an adjustment/guide layer, 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 =A0Design



On Fri, Feb 3, 2012 at 10:25 AM, Byron Nash <byronnash@gmail.com> wrot= e:
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, Simon Bj=F6rk <simon@stillerstudios.se> wrot= e:
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)">
--90e6ba1efd300f92b604b8122e66--