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Radiometry

Infinite Studio has multiple custom nodes that have been programmed to allow the integration of spectral material parameters, including emissivity and reflectivity, into Unreal Engine’s physically based rendering material system

Users can create materials by supplying measured spectral diffuse and specular reflectivity, emissivity, and transmission data, or by defining a spectral directional-hemispherical reflectance curve.

In addition, Infinite Studio provides acess to spectral material databases such as NASA JPL’s ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station (ECOSTRESS) Spectral Library, and the Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) Spectral Library

Example reflectance curve of a Concrete material

Unreal Engine - DHR Asphaltic Concrete MAT

Example of the Concrete material applied to an object

Infinite Studio currently supports MODTRAN for verified high-fidelity atmospheric calculations

The following data is imported from MODTRAN and processed to in-band values:

- Atmospheric transmission based on absorption and scatter
- Thermal radiance
- Solar and lunar irradiance for applying sun and moon directional light source intensities
- Ambient sky lighting (global illumination)