August 31 – September 2, 2026
University of Washington | College of Built Environments |Department of Architecture
Hosted by: Mehlika Inanici, | inanici@uw.edu with support from UW College of Built Environments and Department of Architecture
Location: Gould Hall (GLD), 114, Seattle, WA
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We are delighted to host the annual Radiance workshop! The Radiance Workshop is the annual meeting of the Radiance software community, alternating between Europe and North America. This year’s event will take place in Seattle, Washington, USA.
The workshop brings together researchers, practitioners, and educators engaged in daylighting, rendering, and lighting simulation to present and critically discuss Radiance-related research and applications. Contributions are welcome from participants at all levels of experience with Radiance. Presenters benefit from engagement with leading experts in the field, insights from software developers, researchers, and practitioners, constructive peer review, and a reduced registration fee. Call for SpeakersFollowing the typical format, two days will be the Radiance Workshop (seminars) and one day is the Tutorial Day. We invite contributions to the Radiance Workshop. Submissions on any Radiance-related topic and HDR imaging are welcome. If you would like to present your work, please submit a title and a short abstract (maximum 250 words) to the following email address by July 17, 2026 (early submissions are highly appreciated): inanici@uw.edu. We are looking forward to receiving the submission of your abstract. |
Program:
The program will be updated as details emerge.
Monday, August 31, Radiance Workshop
| 9:00 | Arrival and Coffee | |
| 9:20 | Welcome | Mehlika Inanici |
| 9:30 | What is new with Radiance? | Greg Ward and Taoning Wang |
| 10:05 | Reference models of an office space and a factory hall for hyperspectral Radiance simulations | David Geisler-Moroder, Greg Ward, Taoning Wang |
| 10:40 | Coffee Break | |
| 11:10 | Optimal Parameters for Photon Flow in VR Spaces: A Case Study in a Real-World Architectural Space | Asuka Momiyama, Kosei Moriya, Dong Hyun Kim, Roland Schregle, Takumi Fujiwara, Tsukada Naoki and Nozomu Yoshizawa |
| 11:45 | Applications of Radiance in Measuring, Simulating, and Evaluating ICU ROOMS [Intensive Care Unit Rooms, Objectified, Observed and Measured] | Alstan Jakubiec, Fion Ouyang, and Nazanin Ganjehzadeh |
| 12:20 | Lunch | |
| 14:00 | Radiance Workflow for Human-Centered Evaluation of Sun-Tracking Specular Daylighting Systems | Pegah Mathur |
| 14:35 | A Data-Driven Workflow for Melanopic Daylight Simulation in Honeybee-Radiance | Neda Ghaeili Ardabili |
| 15:10 | Coffee Break | |
| 15:45 | An HDR Image-Based Method for Evaluating Window View Clarity Performance | Xuran Guo, Zhen Tian, David Geisler-Moroder |
| 16:20 | Spectral calibration of HDR Photography | Mehlika Inanici and Martine Knoop |
| 19:00 | Dinner at Serious Pie Downtown (2001 4th Avenue, Seattle, WA 98121) |
Tuesday, September 1, Radiance Workshop
| 9:00 | Arrival and Coffee | |
| 9:15 | An Enhanced Imageless DGP Calculation Method for Complex Fenestration Systems | Yongqin Zhao |
| 9:50 | Glare Prediction for Photovoltaic Panels with Different Reflectance Characteristics: BRDF Estimation and Modeling Using a Simplified Method | Yuto Hama, Okamoto Toshihide, Ohki Chikako, Dong Hyun Kim, Nozomu Yoshizawa |
| 10:25 | Coffee Break | |
| 10:55 | Horticulture Lighting Simulator powered by Radiance | Austin Rouse |
| 11:30 | Simulation for Food: Evaluating Urban Greenhouses | Shafiul Islam and Mehlika Inanici |
| 12:05 | Group Photograph | |
| 12:15 | Lunch | |
| 13:45 | Daylight-Driven Decision Making: Direct Sun Analysis Toolkit Across Design Phases | Lydia Zhong and Michaella Park |
| 14:20 | What’s Trending in Daylighting? | Seif Eses |
| 14:55 | Coffee Break | |
| 15:25 | Case studies on Spectral lighting in healthcare design practice | Marty Brennan |
| 16:00 | New Developments at Solemma in Handling Common Radiance Bottlenecks | Alstan Jakubiec |
| 16:35 | Wrap up for the workshop |
Wednesday, September 2, Tutorial Day
| 8:45 | Arrival and Coffee | |
| 9:00 | Scattering Light: Generating BSDFs and using them in Radiance | David Geisler-Moroder |
| 10:30 | Coffee Break | |
| 11:00 | Healthy Recipes in Radiance: Connecting Lighting and Biology | Mehlika Inanici |
| 12:30 | Lunch | |
| 13:45 | Lighting the Dark Corners of Radiance | Greg Ward |
| 15:15 | Coffee Break | |
| 15:45 | PyRadiance | Taoning Wang |
| 17:15 | Goodbye until next time |
Registration:
Registration link here. It works like a shopping cart, so you would need to add one item at a time (such as Radiance Workshop Presenter and Tutorial Day).
| Registration packages | Price |
| Radiance Workshop Attendee (Days 1 and 2) | $450 |
| Radiance Workshop Presenter (Days 1 and 2) | $400 |
| Radiance Workshop Student Attendee (Days 1 and 2) | $125 |
| Radiance Workshop Student Presenter (Days 1 and 2) | $75 |
| Tutorial Day Student(Day 3) | $75 |
| Tutorial Day (Day 3) | $150 |
Accommodation:
We have reserved a block with a reduced UW rate at the Graduate Hotel at Seattle. The reduced rate is secured till July 30th ($179/night – an apt number for a Radiance event :). You can book your room with the reduced rate with the link here. The hotel is a 13-minute walk to/from the Gould Hall (or you can take a bus (#49) to shorten your walk).
You can take the light rail from SeaTac airport. The hotel is 300 feet (2 minute) walk from the U-District station.
If you are coming from somewhere else, Gould Hall is a 15-minute walk from the University of Washington light rail station.
Beyond the Conference:
August and September are great times to visit Pacific Northwest! Olympic National Park, San Juan Islands, and Mount Rainer National Park are some of the wonderful vacation options in the area. Seattle has many attractions for visitors, including the Space Needle, Chihuly Glass Museum, Pike Place Market, and Art Museums. A short ferry trip to the Bainbridge island would give you great views of Seattle skyline and Mount Rainer on a clear day (as locals say, “when the mountain is out”).