alright here’s something – it uses a similar method to mmColorTarget but is mostly in SOPs, I think it would be quite awkward purely in COPs unless there’s python or expression access to pixel values now in 21.0… it can restore quite busted chart images like the left one back to ACEScg primaries and it’s fast enough to update as you drag the handles around <:tide_pod:415308365942620161> i realise i’ve done this in apprentice which wasn’t very clever of me but maybe an adult could adapt it to be a bit smoother anyway, maybe inside a COPs HDA
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http://fx-td.com/houdiniandchill/wp-content/uploads/discord/20254609/23/25/Ls_MatrixFromChart_v01.hipnc