[Radiance-general] Trans Oddities Part Deux

[Rob Guglielmetti]

Well, I tried Greg's suggestion of setting the limit weight to a very 
low number, but all that did is manage to scrounge up a few additional 
lux.  This actually made things look worse, because my problems are with 
the really dense shades (which are already coming up with higher numbers 
than I'd expect).

I have a spreadsheet here with the results of all my tests so far.  If 
anyone's interested in looking at it I'd be happy to share it.  Perhaps 
there's a problem with my interpretation of this data.  I dunno. But the 
tests indicate that whenever I try a 1% shade in any combination, I get 
very odd results from rtrace.  And the whole reason I'm doing this test 
is because we were getting similar odd results on our real model; I was 
trying to simplify things so I could perhaps isolate something that was 
causing these oddities.  So far, no joy.  I shared my trans material 
definitions for all these tests earlier, but if anyone wants them to 
have a look I can send those as well.

My fear is that I'm simply trying to find too small a percentage of the 
available light, and relative comparisons between different shade 
materials will not be valid for this model. (?)  I mean, this test model 
still has two pieces of diffuse glass in it, and the skylight is prety 
small, so already the building form/glazing is removing a ton of light 
from the space.  Then when I start throwing shades in the skylight 
cavity, we're getting down to really tiny fractions of the exterior 
light.  I dunno, I'd love to hear any thoughts.

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      Rob Guglielmetti

e. rpg@rumblestrip.org
w. www.rumblestrip.org