Understanding the Parameters of a Light Field Sensor

This page describes the parameters to set when creating a Light Field Sensor.

Note: The Light Field feature is in BETA mode for the current release.

Oriented Faces

Light Field sensor measures the distribution of light hitting selected Oriented Faces after a reflection or a transmission.

The geometries are meshed using either the Direct simulation's options or a Local Meshing applied.

The Light Field sensor:
  • measures the radiometry, photometry, spectral intensity for each meshing triangle and direction
  • stores the light distribution for each triangle of the meshing
  • stores the normal for each meshing triangle.

Incident and Azimuth Angles

To measure the light distribution, the sensor requires a sampling of the angular coordinates (ϕ, ϴ) defined by the incident and azimuth angles.
  • Incident angle corresponds to the angle between the incident ray and the normal to the mesh triangle. The min and max values are fixed to 0° and 90°.
  • Azimuth angles vary between 0° and 360°. The min and max values are fixed.
The smaller the angular resolution and the thinner the meshing, the larger memory used to generate the Light Field file and the bigger the file size.