Octane for Houdini

The Polygon Side node assigns black or white values based on the normal direction of a polygon object. This is useful for assigning different textures or materials to different sides of a polygon object. Figure 1 shows a Polygon Side node connected to the Amount parameter of a Mix texture. The Mix texture blends red and green RGB Color nodes. The result connects to an Octane material's Diffuse channel, which is applied to a twisted polygon. This technique is useful for creating a leaf or butterfly wing with different colors, or materials applied to each side.

Figure 1: The Polygon Side node used to color each side of the twisted shape