ACES...

[Graeme Nattress]

That is one issue, but the primary issues at this point have to do with the RRT. IDT's are reasonably straightforward. The RRT is not. The current and past versions of the RRT are very, very complex and due in part to this complexity have some issues with certain images. The RRT is a "work in progress" and is being constantly tweaked to make it simpler, more usable, less noisy, and less prone to "breaking" with certain image values. That's probably what Jim is referring to.

Essentially correct. We know you must use our DRX control full-on to make an ACES file that works with their rendering. That is, as far as I know, the only RED specific gotcha. With the RRT I've seen simple ones and complex ones throughout it's progress and indeed many of the iterations have had noise or colour issues. The latest one I saw was less simple than the previous iteration, so there's obviously still some work to do there. It's that kind of issue we need to deal with next, and they're not RED specific issues, but ACES rendering issues in general. The ODT (output device transform) is also somewhat problematic and needs to be looked at too in the same way that the RRT is being looked at. The present REC709 ODT is very contrasty, for instance.

Jim's comment stands though: " We strongly discourage anyone from using ACES in its current form to grade anything RED except test footage. It is critical that ACES is not considered a current solution for production quality work with RED footage."
- and I'd add that if you are using it you need to be in good communication with Alex at the Academy, and if you're using it on RED footage, you need to be speaking directly to me also.

Graeme