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Is it possible to replicate the digital->film transition with tone mapping? (I assume the answer is yes, but what is the actual mapping?)

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Generally yes, but we're still working on it all these years later! This article by Chris Brejon offers a very in-depth look into the differences brought about by different display transforms: https://chrisbrejon.com/articles/ocio-display-transforms-and...

The "best" right now, in my opinion, is AgX, which at this point has various "flavours" that operate slightly differently. You can find a nice comparison of OCIO configs here: https://liamcollod.xyz/picture-lab-lxm/CAlc-D8T-dragon

Wow, those links are a goldmine, thanks!

I went down the tonemapping rabbit hole for a hobby game engine project a while ago and was surprised at how complex the state-of-the-art is.

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