[Radiance-general] another water question

[John Mardaljevic]

Nick,

> Is there a material to use that gives properties
> closer to water than glass? If so, I’d love to hear
> about it.

If, as seems likely, it is just the specular component of reflection  
that's required, and if that is governed more by the refractive index  
of a transparent material than anything else, then I'd suggest that  
you try using glass again but set the refractive index to that of  
water, i.e. 1.33.  You have to set the (rarely-used) fourth argument  
for glass:

             mod glass id
             0
             0
             4 rtn gtn btn ref_indx

This is very much a guess -- suggestions from someone who actually  
knows what he/she is on about welcome.

-John

-----------------------------------------------
Dr. John Mardaljevic
Senior Research Fellow
Institute of Energy and Sustainable Development
De Montfort University
The Gateway
Leicester
LE1 9BH, UK
+44 (0) 116 257 7972
+44 (0) 116 257 7981 (fax)

jm at dmu.ac.uk
http://www.iesd.dmu.ac.uk/~jm