Good Evening! In C3D R18 there is a feature inside the bump node that enable parallax bump mapping in the material. It is possible to use this in Unity? Will be available this feature in next releases? Thanks in advance!
That is a feature from Cinema 4D and is not in Octane itsself. It would be better to suggest this as a feature for Octane as a whole than just on the Unity plugin section of the forum.
But as an alternative you can also just use displacement. Where you take a height map and plug it into a texture displacement node and from that node you plug the output in the displacement input on the material shader. But if it's a mix material you plug it in the mix material displacement input since a mix material does not keep the displacements from the materials it mixes.
As Antonio said, you can create an octane material in unity. And then make a universal node, a displacement node, and feed a texture to the displacement node. This should give you the same effect, except with fewer artifacts on the edges of the polygon.