Emission - Arnold User Guide
This parameter makes the surface emit light, used to simulate a glow. This can be used to model incandescence (i.e. emission due to a high temperature, e.g. hot metal, lava) or other forms of emission (e.g. fluorescent, LED or halogen light emission).
The emission is assumed to occur from the base surface, so it will be tinted if there is a colored coat or fuzz layer.
Note that a Mesh Light may be more efficient in a situation where you need an object to emit light that casts realistic ray-traced shadows.
Luminance
Controls the amount of emitted light, specified as a luminance in nits (candela per square meter). This is the luminance that the surface would have if the emission color was white.
Emission with high luminance can create noise, especially if the source of indirect illumination is very small (such as light bulb geometry).
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| 0 (default) | 500 | 1000 |
Increasing the number of Diffuse Samples helps reduce any noise in dark, indirectly lit areas of a scene when using emission.
Color
The emission color, which is multiplied into white light of the given emission luminance to obtain the final RGB emission.
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| Red | Green | Blue |