[Radiance-general] Reduce rtrace runtime

[Greg Ward]

OK, you are talking about run-to-run consistency.  We need to be clear on these things.

Try decreasing the -lw setting as I recommended to see how this affects run-to-run differences.  There will always be some random variation, especially using the -u+ setting, but on average these should decrease with increasing calculation times.

Best,
-Greg

> From: Jia Hu <hujia06 at gmail.com>
> Date: August 31, 2010 8:47:50 AM PDT
> 
> Hello Greg:
>  
> For example, for the sky same conditions, I run twice and the results are as follows (each means illuminance of a point). The sky luminance distribution is generated by the gendaylit program.
>  
> MM:1-DD:2-Hour:9-Angle:0 
> 802.381766
> 614.023063
> 395.616407
> 319.185386
> MM:1-DD:2-Hour:9-Angle:0 
> 907.889248 (larger than 802)
> 614.848339
> 393.397623
> 294.201388 (smaller than 319)
>  
> Cheers,
> Jia