Lighting in OctaneRender is generated either 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 (Black BodyAn opaque object that emits thermal radiation. In Octane, this is used to designate illumination properties for mesh emitters. Emission or Texture emission) to geometry Texture Emission or by using an Environment node (Daylight environment, Texture environment or Planetary environment).