[Radiance-general] material properties of ancient window panes?

[John Sutherland]

Ive not done any work on that specific period, but I tried to tackle
this problem in my medieval abbey reconstruction of stained glass. 
I found that for internal views of the glass the material glass was
best, as it could be textured and propagated the light well into the
room. As for external rendering, the glass was far too reflective,
almost like a mirror , therefore I used trans. Have a play with the
settings for it, the reflectivity can be adjusted etc, but I found it
difficult to get the same internal lighting quality with trans.

John

-----Original Message-----
From: radiance-general-bounces at radiance-online.org
[mailto:radiance-general-bounces at radiance-online.org] On Behalf Of Lars
O. Grobe
Sent: 26 April 2004 13:27
To: radiance-general at radiance-online.org
Subject: [Radiance-general] material properties of ancient window panes?

Hi,

does anybody know a ressource for material properties of window panes 
used in ancient buildings? I need data of window glass from byzanthine 
times (500-700 AD). I know few about it, and for reference (to see how 
good or how bad I guess) it would be great to compare with some 
measured data. I will search the library for literature about glass 
technology, maybe there is some reference to history. However, maybe 
one has worked on such materials before?

TIA + CU Lars.


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