To create a Volumetric object in Octane, you can create a volume object by selecting Object / Octane Fog Volume or VBD volume from the Live Viewer menu.
After creating any Volume Object, you will see a menu like below. From this menu you will make all of your Volume work. It is divided into 5 tabs. The first two tabs are the classic Cinema 4D tabs. The remaining 3 tab options that interest us. In the following sections you will find their individual explanations.