On 7/12/19 15:26, Gonzalo Garramuño via Lists.Aswf.Io wrote:

When using the ACES config file, the sRGB/rec709 (ACES) are darker due to the RRT+ODT issue as you pointed out before, so I get a darker image instead of a brighter one, following a similar approach to setting the input to scene linear.

Okay, here's a crazy one.  If I decode the R3D clip as 16 bit, and I set the input color space to Output - Rec.709 and set the view to Rec.709, I get a matching picture to the one you saved out from Nuke12.

It is clear the RED SDK does some magic behind the scenes, but it isn't clear to me what or why.