Leverage Unity’s Post-Processing Stack
Combine the power of Octane’s physics-based rendering with Unity’s Post-Processing Stack to design a signature look for your project. Unity’s color grading, light boom, depth of field, lens flare, and more, can now enhance cinematic scenes composed with OctaneRender® for Unity.
But I have attached a postprocess layer to the camera selected in the PBR render target and it doesn't apply to the octane render. I checked the documentation, and I couldn't find it mentioned there.