Newbie Help: Exporting Float EXRs are clipped

[John Cairns]

Hi all, apologies if this has been covered but I've been searching for a few days without success.

I'm trying to export half-float (16 bit) EXR's out of RedCineX (on a Mac) to composite in Nuke, but all are clipping at 1.

Inside RedCine-X the histogram shows all superwhites as clamped at 1 despite there being information in there, and switching to PDlog685 shows a hard clip @ 685.

Currently as a workaround we're dropping by 2 stops to be in range and then lifting it back up in Nuke, but since this supports floating EXR it seems an unnecessary step.

Anything obvious I'm missing?

Thanks!
John

 

[Graeme Nattress]

John, make sure you're on latest RC-X for the EXR support. We've tested the EXRs in Nuke and we get no clipping and lots of values > 1.

In RC-X the histogram is the integer format / image path, so doesn't represent what an EXR will make. EXRs are always linear light too, so they don't, by their nature, honour any gamma curve selection.

Graeme

 

[John Cairns]

Thanks for the quick reply Graeme. Apparently we were not running the latest build apparently, editorial is downloading and installing now. Hopefully that's the issue.

Cheers!

 

[Graeme Nattress]

I think so - pm me if it doesn't work for you.

Graeme