[Radiance-general] RE: 60Watt bulb luminaries data

[Greg Ward]

Hi Martin,

It's difficult to compare these results in false color, because the two 
programs do not use the same color scale, exactly.  You really need to 
do the point-by-point comparison.

-Greg

> From: "Martin Moeck" <MMoeck at engr.psu.edu>
> Date: July 1, 2004 8:46:55 AM PDT
>
> Model comparisons are tricky. All sorts of calibration and measurement 
> error5s occur.  Do not use a 0.5 m box because it is too small (near 
> field photometry problems). In addition, black has a reflectance of 5% 
> unless you have a heavy sand texture, which gets it down to 2%.
>
> A comparison between radiosity code and radiance code is at
>
> www.personal.psu.edu/mum13/agi_rad.pdf
>
>
> The reflectance is 50% diffuse.
>
> Martin, Penn State
>
> P.S. I would have to run point by point values to do a complete error 
> analysis, but either Radiance or AGI32 1.7 draws the PAR beam not 
> right. The Radiance beam looks a little bit too soft.