The Octane Polygon Side Tex 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 Texture connected to the amount of a Mix Texture node. The Mix texture node blends a red and green RGB spectrum textures together. The result is connected to the diffuse channel of an Octane material which is applied to a twisted polygon. Figure 2 shows a render of the twisted geometry. This technique is useful for creating a leaf or butterfly wing with different colors or materials applied to each side.
Figure 1: A Polygon Side texture is connected to the amount of a Mix texture node which is then connected to the Diffuse channel of an Octane material.
Figure 2: A twisted surface showing a red texture mapped to one side of the polygon and a green texture mapped to the other.