I use ACES because I don’t trust post…

OK, a provocative title for my first post of the year.
It was incomplete and should have said…I use ACES because I don’t trust post guys I don’t know. Just like I don’t trust gaffers, operators, grips, AC’s who I don’t know.

I’ve been experimenting a lot over the last few weeks/months with generating LUT’s that are meant to help the shoot, not to dominate post or impose a “look” onto the final film but to give a level of control and predictability to images onset.

The thing is that “technical LUT’s” do a great job in the hands of people I know and trust but more and more we are having to work with people and workflows that we don’t know and trust and when things go wrong it’s inevitably the fault of the person not in the room.

This is where ACES comes in to play, it gives us a fixed, international , independent reference. Just take the rushes and apply the Image Transform (IDT) and the Output Transform (ODT) and we can see what we shot without any outside help or interference. If with a standard IDT and ODT the image looks OK then the rushes are OK and anything wrong is further down the chain.

That’s it, well for the Cinematographer anyway, there are other advantages for producers but this is a cinematography rant!

Now the problem with this is that we don’t have an ACES onset workflow established, Oh there are all kinds of ways that with DIT’s and shedloads of money we can do anything but I want something very very simple.
What we need are very simple LUT’s to use onset (via LUT boxes or wireless links that will accept LUT’s or via monitors that accept LUT’s) that will show us on a standard 709 onset monitor what the image will look like after going through the ACES post pipeline.

Thanks to Prelight from Filmlight this is now easy to do. I’ve generated LUT’s for Alexa, Canon, Panasonic & Sony cameras that integrate the ACES pipeline and can be used during a shoot in a very simple way. I’ve also generated for Alexa and Canon LUT’s that incorporate the ACES pipeline with a reduction in contrast to 0.85 because that’s how I like to see my rushes!

I’ve generated these LUT’s from both captured footage and live camera input. In the latter case it’s possible to add a “look” to the output as well.
I’m testing these with the NSC at the moment and we’ll be going live with all of this on the 24th of January and after that I may well post some of these LUT’s to the CML website. That is after they have been tested and torn apart by a lot of Cinematographers and DIT’s!!

5 Replies to “I use ACES because I don’t trust post…”

  1. Thanks Geoff. The most lucid and simply elegant description I’ve seen. Exactly the onset process I used with the Viper and Speedgrade, well prior to the advent of the original image protection capability of Aces.

  2. Thanks Geoff. Though I haven’t used Prelight much (Livegrade being the most used LUT gen tool). I will consider it as a program for my DPs to simply understand what ACES can do during prepro to understand the look there going after will be.

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