Octane 2022.1 renders 2021.1.6 scene much darker

[LLLOtoy]

i guess it is due to color management that a scene built with Octane 2021 renders much darker in Octane 2022...
what did change? and how to get back to former brightness and colors?


best

Jan

[juanjgon]

I'm not sure, to be honest. Are you sure that you have the same OCIO config in both versions?

-Juanjo

[LLLOtoy]

yes the settings didn`t change... and settings are in the screenshot.
also i attached an example render where the difference is visible...

right: Mplay image with enable OpenColorIO deactivated, with rendering of Octane2021
left: IPR Octane 2022 - darker than right

right: Mplay image with enable OpenColorIO deactivated, with rendering of Octane2021
left: IPR Octane 2021 - which is matching obviously.

thanks, best

jan

[juanjgon]

Sorry, I'm not an expert in color correction at all, but I think that to export sRGB png files you should select the OCIO sRGB config in the render target node to let the IPR preview math the output file.

-Juanjo

[LLLOtoy]

a late followup,

i found the reason for my scene beeing darker in Octane 2022 as i found out that my problem is not colour-space or alikes but the keepInstancePower checkbox that was added to OctaneLights in 2022, and is on by default.
So opening a file built with a previous version, and using scaled Grid-Lights (surface brightness unchecked) leads to a quite different scene lighting... but is easily fixable by unticking this checkbox on all scaled lights unsed in the scene...



best

jan