Is just a regular per channel sigmoid, Resolve’s CST has the option to change something they call “adaptation”, the default of “9” maps 0.09 scene linear to 0.09 display linear, and 100 scene linear to be 1. This is the same process Resolve uses for their “Davinci Tone mapping”, and finally ,in Resolve when you check the “forward ootf” and gamma 2.4 in reality is just the Rec709 invEOTF
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