LucidShape Enewsletter

February 2019

Using the Ray History Sensor on Surfaces in LucidShape

LucidShape’s powerful Ray History Sensor is typically used to investigate the geometrical light path in a design from the source to the candela sensors to backtrack glare and other problems in the beam patterns. But you can also assign a Ray History Sensor to a surface to find out how rays pass through it or how they travel to a specific surface in your optical model.

This can be helpful for diagnosing anomalies in a design such as light leakage at a mounting feature, or to determine if changing the light engine can be a solution to reduce localized light loss in your design, or simply to verify that rays trace through your design as expected. The following figure shows ray paths restored on two pillows of an edge light design, highlighting the contributions from only two of the available sources. 

Figure: Ray History Sensor Example – Edge light design ray restoration from a surface sensor

The next time you ask, “Where are these rays coming from?” you can use a Ray History Sensor to provide the answer. Open the Assign Material dialog and create a sensor shape with the Ray History Sensor material. Create another surface sensor (e.g., a lux sensor) on the same geometry, and then restore rays from ray history sensor, just as you would if the rays were tracing to a candela sensor.

If you have any questions about this feature, please contact us at

LucidShape CAA V5 Based Version 2018.09 Service Release 2 Available Now

This release includes fixes to several customer-reported bugs. See the LucidShape CAA V5 Based 2018.09-2 Release Notes on the Customer Support Portal to read the “Issues Fixed in This Release,” as well as details about the features included in the LucidShape CAA V5 Based 2018.09 main release and descriptions about known issues and limitations. 

Software and License File Instructions

Direct-Sales Customers

To order a new license of LucidShape CAA V5 Based software, please contact the Synopsys Optical Solutions Group Sales Team at

Or, to update your current version of LucidShape CAA V5 Based software, go to the Synopsys SolvNet website to obtain the latest software and license keys:

  • License key: You will need version 2018.09 license keys for this LucidShape CAA V5 Based release. You can download license keys from the SmartKeys page on SolvNet at

  • To learn more about navigating SolvNet to obtain software and license keys, view our SolvNet overview video.

Distributor Customers

For customers working with distributors, please contact your local LucidShape software distributor to request LucidShape CAA V5 Based software. See the Synopsys Optical Solutions Group Global Contacts page for contact information. If your country is not listed on the Distributors page referenced above, please contact us at for instructions. 

For More Information

See the LucidShape 2018.09-2 Release Notes on our Customer Support Portal.

If you have any questions about features in this release, please contact

Upcoming LucidShape User Group Meetings and Training

LucidShape User Group Meeting - Germany

June 17-18, 2019
Mövenpick Hotel Nürnberg Airport
Flughafenstrasse 100
90411 Nürnberg, Germany
Tel: +49 (0) 911-35010

Please mark your calendars to join us at our annual LucidShape User Group Meeting held in Germany. This year’s user group meeting features presentations on the latest developments in LucidShape products, as well as selected topics ranging from lighting design applications to technical aspects of simulation. 

You are also invited to join our LucidShape experts and fellow lighting engineers on June 17 for an evening reception at Terminal 90 (rooftop bar/lounge of Nürnberg Airport) with complimentary food and drinks. 

There is no charge to attend these events, but registration is required. More details and information to come.

LucidShape Training and User Group Meeting - USA

Crowne Plaza Farmington Hills - Novi
37529 Grand River Avenue
Farmington Hills, MI 48335
(248) 477-7800

Hotel website

Join us for our annual LucidShape training and user group meeting in July 2019 at the Holiday Inn Hotel and Suites in Farmington Hills, Michigan. Please save the dates for:

  • July 10-12: Introductory Training
  • July 15-16: Advanced Training
  • July 17: User Group Meeting
  • July 18: LucidShape CAA V5 Based Training or Script Training

More details and information to come.

If you'd like to give a presentation at any of these user group meetings, please contact us at

Modeling Customer Surface Roughness with LucidShape 2D Scatter Curve BSDF Material

LucidShape accurately simulates how light interacts with a surface using surface materials that define interactions in terms of reflection, transmission, absorption and scattering. Because all surfaces scatter light to some degree, surface materials also provide a way to specify a scattering distribution, which is necessary to achieve the most accurate optical simulations.

Surfaces in LucidShape can be of specular (i.e., ideal) quality with no scattering, or you can assign to them any of the available scattering material properties -- Gaussian or Lambertian scattering, user-defined scattering with a table of measured values, scattering based on a 2D scatter curve, and many more.


For the latest event calendar, please go to our Events page.