2018 International Radiance Workshop (March update)

Dear Colleagues,

We've had a request to flip the dates for the tutorial/training day and have it at the end. In other words, the Workshop days would be Monday/Tuesday 3/4 September, and the optional tutorial/training day on Wed 5 September. Would that cause problems for anybody? Please reply to the list.

See below for additions to the list of presentations and sessions proposed for the tutorial/training day.

The 2018 International Radiance Workshop (3-5 September) webpage is up and abstract submission is open (please use the email link on the webpage):


The page contains travel and accommodation information.

Thus far, the following are proposed for the tutorial/training day:

1. Ambient calculation crash-course. A perennial favourite giving a excellent 'under the hood' introduction to one of the keystone features of the Radiance system.

2. A exposition of the 4 Component Method (4CM) daylight coefficient approach. The 4 Component Method was, it seems, the first daylight coefficient implementation (originally devised in 1995). It was revised in 2003, and tweaked since then. The rationale for including it during the tutorial day is because knowing how the 4CM approach works makes it much easier to understand how all the other, subsequent, daylight coefficient formulations work. Also, the rigorous validation that the 4CM approach was subjected to helps illustrate and explain many of the accuracy issues that apply to all the Radiance DC formulations.

3. Setting up a DSLR for long-term autonomous capture of HDR images. Based on our experience with long-term HDR monitoring in conservation and classroom settings, this session will show how to configure a Mac Mini and Canon DSLR for long-term autonomous capture of HDR images. Software is all freely available: gphoto2, hdgen, etc. Scripts etc. will be provided. By long-term, we mean until the hard-drive is filled or the shutter mechanism fails. The longest completely unattended monitoring session we achieved was nearly 11 months with a HDR capture every 10 minutes 24/7.

Further suggestions are invited for the tutorial/training day – either sessions you'd like to hear or give – please send them to the organisers (Eleonora & myself) using the email link on the webpage.



Presentation titles so far include:

- Visual comfort with side-lit at restaurants under sunny climates (determined using DIVA and the multi-phase methods).

- Relating climate-based daylighting metrics to long-term occupant perceptions of lighting quality

- New metrics to evaluate quantity and quality of daylight for multi-zoned electrochromic glazing.

- Meteorological data for climate-based daylight modelling.

- Validation of HDR derived illuminance measurement in a conservation setting.

Looking forward to receiving many more in the next few weeks!


Workshop costs are being finalised. Rest assured, they will be in keeping with the long-standing Radiance tradition of affordability. Also, accommodation in Lboro is fairly reasonably priced (see the webpage). I know there are some other meetings are happening in Lboro that week, so if you are set on coming you may wish to book accommodation fairly soon. The (very handy for the Workshop) Burleigh Court Hotel is likely to get fully booked that week.


John Mardaljevic PhD FSLL FIBPSA
Professor of Building Daylight Modelling
School of Architecture, Building & Civil Engineering
Loughborough University
LE11 3TU, UK

Tel: +44 1509 222630 (Direct)
Tel: +44 1509 228529 (Secretary)

[email protected]


2018 International Radiance Workshop
3-5 September 2018, Loughborough University, UK