For more about Octane I just noticed recently that the Cinema 4D Octane support articles on the OTOY site are really comprehensive and well written. This article on displacement for example in Octane for Cinema 4D: https://help.otoy.com/hc/en-us/articles/5384832960539-Displacement-in-Octane-for-Cinema-4D-Part-2-Model-and-Texture-Considerations