Visualizing an Inverse or Direct Simulation LPF Result

This page shows how to use an LPF result generated from an inverse or a direct simulation. LPF files appear only if light expert is activated during the simulation.

Note: If you need more information, see Light Expert.

To visualize a LPF Result for an Inverse or a Direct Simulation:

  1. From Speos tree, double-click the *.lpf file.

    Virtual Photometric Lab loads the XMP result with the first measure area available in the Measures tool on the first opening. The selected measure area (in the Measure tool) upon save is displayed on the next openings. Light Expert panel is displayed.

    Note: If necessary, you can hide the XMP result of the 3D view for a better display of the *.lpf ray tracing.
  2. From the Faces filtering drop-down list:
    • Select And to display rays that have at least one intersection with each selected faces.
    • Select Or to display rays that have at least one intersection with one of the selected faces.
  3. Define the Ray number to be displayed in the 3D view.
  4. In Ray length, set a value to define the ray length preview.
  5. In Virtual Photometric Lab, click Measure.
    Extended map Extended map with surface tool
  6. If necessary, modify the measure area, shape or position on the map to update the ray tracing preview in the 3D view.
    The ray tracing of the 3D view is adjusted in real-time to illustrate the light path from the sources to the sensor.
  7. If you want to filter the rays displayed in the 3D view:

    • Click and select the Required faces (the faces that are taken into account to filter rays).

      The rays impacting the required faces and reaching the sensor are displayed in the 3D view.

    • Click and select the Rejected faces (the faces that you want to exclude from the light trajectory).

      The rays reaching the sensor, excepted those impacting the rejected faces are displayed in the 3D view.

  8. If you want to better visualize rays paths:
    1. Click Section mode .
      The Section mode appears in the 3D view and you can move it thanks to the 3D Manipulator to modify its position and orientation therefore cutting the geometry and see the rays paths.
    2. If the 3D Manipulator is not enough discernible, in the Section mode section, with the Rotation handles from center distance parameter you can modify the distance of the rotation manipulators to the center of the 3D Manipulator.