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Blender addon. Incorrect work of node "OCIO color space"
Posted: Mon Sep 22, 2025 11:47 am
by s7unned
Hello. Blender octane node "OCIO color space" works incorrect when set to "Output SRGB". As you can see on the screenshot, it produces artifacts on bright areas, like its some sort of clamping happening. Under is a picture of how it should work (tested in cycles). You can easily try to reproduce this bug youself.
Re: Blender addon. Incorrect work of node "OCIO color space"
Posted: Thu Sep 25, 2025 8:20 am
by linograndiotoy
Which version are you using?
Also, could you please share your scene with us?
Thanks.
Re: Blender addon. Incorrect work of node "OCIO color space"
Posted: Thu Sep 25, 2025 11:29 am
by linograndiotoy
Most important thing: please check if View Transform in your Color Management options is correctly set to Raw.
Re: Blender addon. Incorrect work of node "OCIO color space"
Posted: Tue Oct 07, 2025 2:00 pm
by s7unned
Thank you for answer. Version 30.7.0. View transform was set to Raw.
As far as i understand, the problem was that i set IDT as "Output sRGB", which makes bright areas of texture exceed 1. Which is not physically correct, since albedo in octane cant exceed 1. If i set same texture with same IDT as emission, then all clamping is gone. Right IDT to use for 8bit textures should be "Utility - texture - SRGB". Correct me if Im wrong.
Re: Blender addon. Incorrect work of node "OCIO color space"
Posted: Fri Oct 10, 2025 7:44 am
by Merc25
the “Output sRGB” mode seems to clamp highlights incorrectly. Definitely worth reporting as a bug to the Octane devs for a fix.
Re: Blender addon. Incorrect work of node "OCIO color space"
Posted: Thu Oct 30, 2025 7:09 pm
by s7unned
That is why it was confusing to me, because in other renderers "Output SRGB" on albedo works fine.