You use either the Slate or Compact MaterialThe representation of the surface or volume properties of an object. Editor to work with Octane materials and maps. For this example, we will focus on the Slate Material Editor. The Octane materials and maps are under the "OctaneRender..." groups in the Material/Map Browser. For beginners, focus on the Universal Material, RGB Image, and 2D transformation nodes.
Figure 1: Slate Material Editor