Daylight autonomy not working for lower lux levels

Hi
I achieve results for daylight autonomy for 300 lux in 50% occupancy, but get 0 as a result when simulating lower lux values like 160 lux in 80% occupancy or so. Why is it occuring?
217062 NGVC Site Analysis 00 220719 AT.gh (68.4 KB)

I am still facing this issue, there’s a steep decline around 50% time but for all the threshold values now.
Also can’t find any solution/ relevant discussion in the forum for this issue.

Your geometry isn’t internalized in your file but it also doesn’t really show what your question is or what type of result you were expecting. Please be more specific since there doesn’t seem to be anything wrong about your file, except maybe that I’d recommend using some better Radiance parameters (with more ambient bounces) if you are hoping to accurately account for low light conditions.

Yes better parameters were missing and it worked, thanks.

Me and my colleagues would like to know, which parameters would you recommend?


We are using these and would like to know if they are ok?

When you understand what each of the different parameters do, you’ll realize that there’s no one set of recommended parameters for all geometries. But you can use the HB Radiance Parameters component to get recommended Radiance parameters for different levels of quality. If you need to capture low light conditions, you should be using a minimum of “medium”.