I have already been answered elsewhere .. Octane can not bake geometry, only materials. So the question can be closed.

Believe me, I know how to bake models with unwrapping in Octane .. the question was completely different, or are you implying that apart from this, nothing is available?
The only question was how to bake a high poly model (without unwrapping) for the same low poly model with a custom Unwrapping ...

Hello !
I'm not sure, but how can this help me in my question?

Greetings !
I have a task that I can’t solve in 3ds max with Octane.

Let me explain the situation:
I have a low poly mesh with UVW. There is also a high-poly model with various materials assigned to it (Multi / SubObject), with standart Box Mapping. I'm trying to bake through the "projection ...