Lighting in OctaneRender Standalone is generated using either an environment (Daylight or Texture environment) node or by connecting an emissive DiffuseAmount of diffusion, or the reflection of light photons at different angles from an uneven or granular surface. Used for dull, non-reflecting materials or mesh emitters. texture to geometry. Using an IESAn IES light is the lighting information representing the real-world lighting values for specific light fixtures. For more information, visit http://www.ies.org/lighting/. light profile texture geometry can be shaded to behave like a physical light in the scene.
By default all light you see in a an Octane scene when you first add geometry is generated by a white texture. When you add an environment node to the Octane scene and connect it to the render target it will override the white light. Adding a black texture environment to the scene will create a dark environment. You can then add geometry with emissive textures or a high dynamic range texture (or both) to light the scene. Figure 1 shows an object lit using an emissive texture applied to a polygon plane. A black texture environment is used to black out the background lighting.
Figure 1: An object is lit using an emissive texture applied to a polygon plane
The articles ion this section cover the nodes that are used to light a typical Octane scene.