[Radiance-general] advice for material modeling

[Dan Glaser]

Hi Everyone,
   I am trying to model reddish "sandstone" as well as a brick called 
"Navajo Gold."  The red sandstone has uneven, broken "layers" with 
little bumps on its surface.  The Navajo Gold brick varies in color, has 
tiny holes pocketing its surface, and also may not be flat.
   Here is a link to an image of the sandstone:

http://www.lightfoundryllc.com/materials/sandstone.jpg

   And a few links to images of the Navajo gold:

http://www.lightfoundryllc.com/materials/ng0.jpg
http://www.lightfoundryllc.com/materials/ng1.jpg
http://www.lightfoundryllc.com/materials/ng2.jpg
http://www.lightfoundryllc.com/materials/ng3.jpg
http://www.lightfoundryllc.com/materials/ngside.jpg

  Unfortunately I do not have direct access to the materials, but 
someone has measured their general reflectance values.
   I would like to create a high quality rendering of an interior curved 
wall made with red sandstone.  We are designing skylights for accenting 
this wall for people outside to see (they would look through a glass 
curtain wall to see it).  Ideally we would like to see little shadows on 
the surface of the red sandstone due to its uneven layering and some 
other effects due to its texture.
   It would also be nice to have a good rendering of the Navajo Gold 
brick walls, but this is less of a priority.
   Can anyone give any advice for how to model the pattern/textures/etc. 
for this or have pointers to success stories for these types of materials?
   Thanks!

- Dan


-- 
LF logo 	Daniel C. Glaser, PhD, LEED AP
Principal
Light Foundry, LLC
T: 510.387.8890 | F: 315.410.2617
www.lightfoundryllc.com <http://www.lightfoundryllc.com>

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