[Radiance-general] material trans and glass?

[Victor Li]

Thank you all very much!

Andrew mentioned "Transmisivity is the amount of light NOT absorbed in one
pass through the glazing.  "
Does it mean that the Transmisivity is the amount of light transmitted and
reflected by a meterial?


>From the web "http://www.schorsch.com/rayfront/manual/dielectricdef.html" , "
*Transmittance* is the total light transmitted through the pane including
multiple reflections"


So the difference between Transmisivity and Transmittance is the light
reflected?


According to Andrew's email, for glass with VLT of 0.325 has a transmisivity
of 0.354. The glass is defined as

void glass glazing.325
0
0
3  0.354  0.354  0.354

For trans with VLT 0.325 and no diffse transmission. Can we difine it as the
following?

void trans window.0.325

7     0.325 0.325 0.325 0 0 1 1

For glass, the light transmitted would be specular transmitted,  is it
right?  If right, what is the differrence between above meteirals definition
-  glass glazing.325 and trans window.0.325?
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