Blender addon. Incorrect work of node "OCIO color space"

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s7unned
Posts: 1
Joined: Mon Sep 21, 2020 11:43 pm

Image



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.
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linograndiotoy
OctaneRender Team
Posts: 1377
Joined: Thu Feb 01, 2018 7:10 pm

Which version are you using?

Also, could you please share your scene with us?

Thanks.
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linograndiotoy
OctaneRender Team
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Joined: Thu Feb 01, 2018 7:10 pm

Most important thing: please check if View Transform in your Color Management options is correctly set to Raw.
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s7unned
Posts: 1
Joined: Mon Sep 21, 2020 11:43 pm

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.
Last edited by s7unned on Tue Oct 07, 2025 2:02 pm, edited 1 time in total.
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Merc25
Posts: 1
Joined: Fri Oct 10, 2025 7:32 am

the “Output sRGB” mode seems to clamp highlights incorrectly. Definitely worth reporting as a bug to the Octane devs for a fix.
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