Category: Processing > Raytracing
Emits photons onto a scene based on surface characteristics, such as diffusion and transparency. You can manipulate photon properties such as specular color, refraction, etc. This tool is used to create caustics, and it is usually connected to the Photon input of the Material node.
This shader is connected to the Photon input of the Material Node. Without this shader (or a surface connection in the Photon input), caustics and global illumination effects will not render. Instead of defining a color, you can also connect a texture to either the Diffuse, Specular or Transparency inputs.
Placing another shader, such as a color correction shader, between the Material node and this shader will nullify any photon effect. This shader must be directly connected to the material node.
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