Thank you for testing it in the standalone version, so the problem seems to happen only in unity octane or what? Should I post this thread in general forum as xhed sugested?
Thank you again
These are two different behaviors.
For the noise texture, I suspect the explaination is that the gamma is applied after the invert. So if you have a gamma of 1, you will get the behavior you expect.
In your example it is 1.5
The normal texture has a similar problem, but in reverse. The gamma is applied to the texture first, and then the invert is applied.
If you set gamma to 1, you get similar results as photoshop.
This is an Octane feature, so general discussion would the right place to ask about it.