## On this page

  

 

 # asset\_preparation::v3::directional\_light::Custom Struct Reference

 Last update: 16.07.2025 

The properties of a custom directional light. [More...](structasset__preparation_1_1v3_1_1directional__light_1_1_custom.xhtml#details)

Collaboration diagram for asset_preparation::v3::directional_light::Custom:

![Collaboration graph](/sites/default/files/migrate-content/avxcelerate_asset_preparation_api_2024_r2/structasset__preparation_1_1v3_1_1directional__light_1_1_custom__coll__graph.png)

\[[legend](graph_legend.xhtml)\]

## <a name="pub-attribs"></a>Public Attributes

google::protobuf::DoubleValue [exitance](structasset__preparation_1_1v3_1_1directional__light_1_1_custom.xhtml#ae65e35ece99b2b5331074385f63f5285) = 1 [SpectrumLibrary](structasset__preparation_1_1v3_1_1directional__light_1_1_spectrum_library.xhtml) [spectrum\_library](structasset__preparation_1_1v3_1_1directional__light_1_1_custom.xhtml#ab7f99670794fafb421994f0d927ca1b1) = 2 [BlackBody](structasset__preparation_1_1v3_1_1directional__light_1_1_black_body.xhtml) [black\_body](structasset__preparation_1_1v3_1_1directional__light_1_1_custom.xhtml#a1dab03af33b34241a92a95c01e4ceafa) = 3 [Monochromatic](structasset__preparation_1_1v3_1_1directional__light_1_1_monochromatic.xhtml) [monochromatic](structasset__preparation_1_1v3_1_1directional__light_1_1_custom.xhtml#a27ae8fbdea5ac36dc601da8a95ed9841) = 4 <a id="details" name="details"></a>## Detailed Description

The properties of a custom directional light.



## Member Data Documentation

<a id="ae65e35ece99b2b5331074385f63f5285"></a>## [◆ ](#ae65e35ece99b2b5331074385f63f5285)exitance

 google::protobuf::DoubleValue asset\_preparation::v3::directional\_light::Custom::exitance = 1

The directional light exitance.

Unit: lm/m2

NoteMust be positive.The default value is 40000. 



<a id="ab7f99670794fafb421994f0d927ca1b1"></a>## [◆ ](#ab7f99670794fafb421994f0d927ca1b1)spectrum\_library

 [SpectrumLibrary](structasset__preparation_1_1v3_1_1directional__light_1_1_spectrum_library.xhtml) asset\_preparation::v3::directional\_light::Custom::spectrum\_library = 2

ONEOF(spectrum) Spectrum based on a spectrum file.

NoteThis is the default type of spectrum. 



<a id="a1dab03af33b34241a92a95c01e4ceafa"></a>## [◆ ](#a1dab03af33b34241a92a95c01e4ceafa)black\_body

 [BlackBody](structasset__preparation_1_1v3_1_1directional__light_1_1_black_body.xhtml) asset\_preparation::v3::directional\_light::Custom::black\_body = 3

ONEOF(spectrum) Spectrum based on a black body.





<a id="a27ae8fbdea5ac36dc601da8a95ed9841"></a>## [◆ ](#a27ae8fbdea5ac36dc601da8a95ed9841)monochromatic

 [Monochromatic](structasset__preparation_1_1v3_1_1directional__light_1_1_monochromatic.xhtml) asset\_preparation::v3::directional\_light::Custom::monochromatic = 4

ONEOF(spectrum) [Monochromatic](structasset__preparation_1_1v3_1_1directional__light_1_1_monochromatic.xhtml "Monochromatic spectrum.") spectrum.





---

The documentation for this struct was generated from the following file:- directional\_light\_description.proto