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Hi @guillaume ,
I'm not sure I understand what I'm seeing in the second screenshot but I don't think it's chromatic aberration but out-of-gamut color clipping due a misconception about the color managed workflow.
First, the ACEScct managed LUTs do not contain any IDT or ODT settings, so the Red WideGamut Log3G10 IDT and Rec709 ODT are bypassed in the LUT.
The color managed workflow expects an ACEScct input to the LUT or it won't work as expected.
The workflow is explained here: https://www.color.io/user-guide/using-color-io-with-davinci-resolve
You need to set your IDT and ODT inside Resolve and sandwich your Color.io LUT in between these ACES IDT and ODT nodes.
So I think that the image you're seeing these artifacts on is not in ACEScct color space which is what the LUT requires, which is why there's gamut clipping.
Hi @monokee,
Thanks for your reply.
I use the lut in a CCT workflow, in Resolve but independently the IDT and ODT, the color gradient which shows the color transformation should be "clean" in an ideal world. Furthrtmore, I only used the preset factory for this test
@guillaume The black holes in the gradient are certainly a gamut issue. The banding I'm seeing in the gradient is because the image has been highly compressed for upload so it's hard to evaluate. Other than that the transitions are looking quite clean as far as I can tell from this image... I'm still not quite sure what the issue is here. Please send me an uncompressed image of actual footage - no color charts or gradient images - to jonathan@color.io. Please also clearly indicate any issues by marking up the image with arrows or circles so that we are on the same page. This will help me better understand the issues you are having and hopefully provide a better answer. Thank you so much!