Ok, please write to help at otoy dot com asking for Beppe, in this way I can investigate more deeply.

ciao,
Beppe

Hi,

Good to hear you have partially solved.

If you can share the scene with me via Private Message, I can try to have a look to it.

ciao,
Beppe

Hi Marx,

Please write to help at otoy dot com, sharing your OTOY username and scene ID number, thanks.

ciao,
Beppe

Hi,

Yes, you can!

Open the .orbx scene in Standalone, then go to menu File/Unpack package, choose a destination and hit OK.
An "assets" folder will be created in the chosen location, with all geometry and texture nodes used in the scene.

ciao,
Beppe

Hi,

Thanks for sharing the scene, it was very useful.

It turned out that the scene was made with a more older c4doctane version, 2020.2.4 to be precise:
IMG_6881.jpeg

The "Non-color data" issue in ImageTexture node is a 2020.2.4 thing, already fixed in c4doctane 2020.2.5, while the Transmission ...

Hi,

Please save the project with assets, compress the resulting folder than share it with me via Private message, thanks.

ciao,
Beppe

Hi Andreas,

Ok, send me a link to the scene via Private Message, thanks.

About RTX 50X0 Blackwell, yes, the first version supporting it is 2025.1.

ciao,
Beppe

Hi,

which exact version of 2026.1 are you using?

I have just tried to create a scene with c4doctane 2021.1.6-R3 in C4D R26, with ImageTexture node and an Universal material with Transmission type set to Specular:
IMG_6862.jpeg

Then opened with C4D 2026 and OctaneRender plugin 2026.1-v1.8.2, and ...

Or in 2026.1 you can now create a Trace set on the Light, then on the Glass, apply an Octane Object Tag, and exclude the Light set with only Refractive active, and "Apply to future hits" value sets to "Next hit only":
IMG_6849.jpeg

There is a sphere light behind the glass, but is is only visible ...

Hi,

You can try with new "NormalMap(MX)" node, with Flakes in the "in " pin, and a FloatTexture in the "Scale" pin, so you can enter values greater than 1: ciao,
Beppe