Defining a New Light Source Spectrum

The following procedure helps you define a new spectrum on a specific light source through the Virtual Lighting Controller.

To define a new spectrum:

Prerequisites: To open the Virtual Lighting Controller, you must have a map with data separated by source, surface or sequence (extended or spectral).
Prerequisites: The spectral map must contain spectral data. Otherwise you will not be able to perform the procedure.
Note: When you change a spectrum for the first time, all spectral data are downloaded in the memory and all modified calculations of layer's power are made on the spectral data. This can take more time than usual. To avoid this when you do not need any new spectrum change but only power change, you can clear the View > Load spectral data option.
  1. Open the Virtual Lighting Controller .
  2. In the Virtual Lighting Controller window, from the Layer Configuration list, select the configuration in which you want to define a new light source spectrum.
  3. Click to open the spectrum of the light source.
    The Light source spectrum window appears displaying the spectral information of the light source together with radiometric and photometric information. The vertical lines represent the spectral sampling of the XMP.

  4. Define a new light source spectrum:
    1. Check Define a new light source spectrum.
    2. Click to open the File Explorer and load a *.spectrum file.
    Note: The spectral sampling of the XMP should be sufficient to cover the spectrum of the new layer. However, make sure the spectrum of the initial layer is not null within all spectral zones on which the new spectrum is not null.
    The new spectrum appears below the initial spectrum.
  5. Close the Light source spectrum window.
    The icon informs you that a new spectrum has been added to the source.
  6. If Automatic Update is not checked in the Virtual Lighting Controller, click update to manually compute the changes.
The XMP result displayed changes accordingly. The spectrum of the new source is normalized to get the same power as the initial source. The unit is either photometric or radiometric depending on the one selected in the View menu.