On 31 October 2016 at 09:10, Neil Scholes <n...@uvfilms.co.uk> wrote:
> 1/ changing primaries from sRGB to AlexaV3LogC - get rid of a ton of > negatives ( values lower than -1) > I’m taking a guess here ( shares the same primaries as rec709) > white point still D65 This certainly sounds non-standard, before converting what are the minimum/maximum values in the files? Like Joseph says the average 'full' black should be around 95 similarly there are limits on where the peak whites end up, I've seen cases where ARRI Log C files have been graded prior to coming to me that results in more problems than when they were left as is. As to sRGB/709 primaries these are usually easy to spot as a simple LogC -> linear followed by a 2.2-2.4 gamma curve on a monitor with those primaries makes a reasonable looking image give or take highlight clipping - though that can depend on there being something in the scene that is a memory colour (skin, ColorChecker chart, etc) Kevin -- *Framestore* | Kevin Wheatley | Head of Imaging *London* - New York - Los Angeles - Montreal 19-23 Wells Street, London, W1T 3PQ T: +44 (0) 20 7344 8000 framestore.com <http://www.framestore.com/> Facebook <https://www.facebook.com/Framestore> Twitter <http://twitter.com/Framestore> _______________________________________________ Nuke-users mailing list Nuke-users@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/ http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
