[Radiance-general] Building on a hillside

[Lars O. Grobe]

Hi Randolph,

I am not sure wether I get your answer correct. The horizon is (almost) at an infinite distance, and moving up 700m doesn't change that much. In fact, you apply your sky distribution which depends on angles, not carthesian height, to a source object to make it appear infinitely distant in Radiance.

I would try to get a good representation of the horizon line (in degrees from the ideal horizon) to assess shadowing. Reflective properties in the mountains can be interesting, too, e.g. if you have snow for a long period of the year. In general getting climate data for such an exposed location is interesting.

Cheers, Lars.
--
Dipl.-Ing. Architect Lars O. Grobe

On Nov 15, 2010, at 22:45, "Randolph M. Fritz" <RFritz at lbl.gov> wrote:

> I'm simulating a test structure on a hillside site; the ground drops away dramatically.  So a lot of sky is visible below what would be the horizon on a level site.  So far as I can tell, the only way to simulate this correctly (if the ground reflectance and sky light is significant) is to give the model an actual elevation, z = 700 feet or whatever.  Do I have that right?
> 
> -- 
> Randolph M. Fritz • RFritz at lbl.gov
> Environmental Energy Technologies Division • Lawrence Berkeley Labs
> 
> 
> 
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