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Mod articles
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HDR LUTs - guidance in an unnavigable sea
ABSTRACT
HDR LUTs (confusingly) require the assumption of 2.4 gamma, therefore, in your image formulation and after your output transform/device rendering transform, linearize the PQ or HLG curve (if it exists) and apply a gamma of 2.4 to the image. Your LUT is now correct for HDR.
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The output transform you use MUST be an HDR output transform of the highest-possible maximum luminance. In the case of the ACES2 experimental OT DCTLs, this is 1000 nits; in the case of ACES1 in DaVinci Resolve, this is 4000 nits.
HDR-COMPATIBLE LUT FORMULATION WORKFLOW(s) IN DAVINCI RESOLVE
This workflow begins in the Fusion tab with a LUT cube creator node. Make it vertical and a size of 64. Add a CST, its input color space will be Rec.709 and its gamma LogC3---its outpu...