[Radiance-general] Missing solar source visibility from gendaylit for multiple ambient-bounces

[J. Alstan Jakubiec]

To reply to my own post, I had another generic office model sitting 
around, so I applied the same materials, same sky model and same 
rendering parameters, but the solar disc showed up this time. So perhaps 
it had something to do with how obj2rad was constructing the surfaces? 
*Shrugs*

Alstan

On 6/1/2015 11:54 AM, J. Alstan Jakubiec wrote:
> Dear List,
>
> I'm running into a bit of a frustrating issue, and I am not sure what 
> the cause might be. I am creating a sky model using gendaylit with a 
> high amount of direct solar component as seen below,
> > gendaylit 05 18 8.667 -W 881 63 -a 1 -o -104 -m -120
>
> The issue is that when I render my scene using -ab 1, I can see the 
> solar disc. When I render it with a higher number of ambient bounces, 
> such as 4, the solar disc is absent from the final visualization. You 
> can see the results here: 1 ambient bounce 
> <https://dl.dropboxusercontent.com/u/3175325/ab1.png>, 4 ambient 
> bounces <https://dl.dropboxusercontent.com/u/3175325/ab4.png>. You 
> will notice that in the rendering with 4 ambient bounces, the shadows 
> are still cast properly as if the sun is present.
> I am using a slightly older version of Radiance right now (RADIANCE 
> 4.2a lastmod  by  on w015t-001), but I suspect that isn't the root of 
> the problem. This issue also occurs when I use gensky 
> <https://dl.dropboxusercontent.com/u/3175325/ab4_clsky.png>. I have 
> never seen this kind of behavior before from Radiance. Does anyone 
> have thoughts as to what might cause this?
>
> Thank you,
> Alstan
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
> http://www.radiance-online.org/mailman/listinfo/radiance-general

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.radiance-online.org/pipermail/radiance-general/attachments/20150601/ffe86bc5/attachment.html>