This node is a variant of the Opaque Surface (Surface-to-Surface Radiation Interface) node with a surface emissivity and diffuse reflectivity equal to zero and the surface specular reflectivity,
ρs, is then set to one. It is available when the
Surface-to-surface radiation method is set to
Ray shooting in the settings of the Surface-to-Surface Radiation interface. It applies to glossy surfaces which behave like ideal mirrors that reflect all irradiation specularly. Zero values of emissivity and diffuse reflectivity result in identically zero radiosity. It is then not needed to solve for this variable. The node replaces the radiosity shape function for each spectral band on its selection with the explicit value of zero. The radiative heat flux on a specular mirror boundary is zero.