ACES Color Space

[busseynova]

reverse the transform: srgb display to linsrgb, expose with multiplying linear data, go back to acesot (aces' srgb display odt). fnord had ocio plugin for ps. or make some luts for -1EV, +0.5EV etc. or maybe even curves presets.

I think I'm with you, you're saying to get (for example) an exposure adjustment to work correctly in photoshop, you have to transform back to linear, as an image with baked ACESOT LuT will not be linear!?

[piotrus3333]

I think I'm with you, you're saying to get (for example) an exposure adjustment to work correctly in photoshop, you have to transform back to linear, as an image with baked ACESOT LuT will not be linear!?

if you need the wiggle room with exposure, yes, that would be ideal.

[piotrus3333]

reverse the transform: srgb display to linsrgb, expose with multiplying linear data, go back to acesot (aces' srgb display odt). fnord had ocio plugin for ps. or make some luts for -1EV, +0.5EV etc. or maybe even curves presets.

I think I'm with you, you're saying to get (for example) an exposure adjustment to work correctly in photoshop, you have to transform back to linear, as an image with baked ACESOT LuT will not be linear!?

but what exactly do you need to be able to do in PS 32bit mode?. just exposure or lightmix/comp as well?

[busseynova]

When I've used it previously it's been too lightmix, control certain elements: reflections/shadows etc individually, and comp in photographic elements.

[piotrus3333]

ok - so this is .csp lut for Photoshop 32bit mode. tested in Corona 10 and in whatever current PS version is.

it has the difference between view transforms between Corona and PS baked in, so 8-16bit output from Corona will match 8-16bit output from PS.

Corona ACESOT LUT for PS:
https://piotrus3333.gumroad.com/l/dvhkvo

images to compare attached.
images sourced from:
https://github.com/ampas/aces-dev/tree/dev/images
https://polyhaven.com/a/studio_country_hall
https://polyhaven.com/a/circus_arena

[piotrus3333]

images to compare attached.
images sourced from:
https://github.com/ampas/aces-dev/tree/dev/images
https://polyhaven.com/a/studio_country_hall
https://polyhaven.com/a/circus_arena