More > JRiver Media Center 31 for Windows
JRVR > Calibration > 3DLUT Gamma (tone curve) - what is it?
mattkhan:
thanks, will try it out this afternoon
Hendrik:
One other thought I had, do you have a ICC profile with gamma ramps loaded, and instructed madVR to clear them?
mattkhan:
I measured using the test build and the madvr 3dlut format, the good news is it measures the same as the cube format, the bad news is the low end roll off still exists.
re ICC profile, I thought it was set to linear and I've never knowingly installed one but I will check this
Hendrik:
Apparently madVR 3DLUT files can contain gamma ramps that get loaded into the GPU. This seems rather undocumented and I only found out about it in the ArgyllCMS source code. Although it still makes me wonder that you would expect the DisplayCal to produce a .cube 3DLUT without also needing gamma ramps to get loaded...
mattkhan:
I'm not familiar with windows ICC but I think there is nothing loaded except system defaults, attached pic of colour management dialogs in case that helps
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