[Radiance-general] Re: gensky manpage

[Greg Ward]

Hi Rob,

You are correct!  The gensky man page should be updated, and I have 
updated it at your prompting for the next release to use:

skyfunc glow skyglow
0
0
4 .99 .99 1.1 0

-Greg

Begin forwarded message:

> From: Rob Guglielmetti <rpg@rumblestrip.org>
> Date: Thu May 22, 2003  8:48:12  AM US/Pacific
> To: Greg Ward <gward@lmi.net>
> Subject: gensky manpage
> Reply-To: rpg@rumblestrip.org
>
> Hi Greg,
>
> I think I may have discovered an error in the documentation on the 
> website.
>
> If you go to http://radsite.lbl.gov/radiance/man_html/gensky.1.html 
> and look at the sample input for using skyfunc, it recommends:
>
> skyfunc glow skyglow
> 0
> 0
> 4 .9 .9 1 0
>
> ... but I remember finding a very useful email from you in the 
> Radiance Digests about making sure the photopic average for your rgb 
> values always adds up to 1.  It was the basis for my "skyfunc RGB 
> checker" utility on materials spreadsheet. According to my 
> spreadsheet, .9 .9 1 works out to a photopic average of .9065, 
> indicating a sky radiance that skyfunc will "undershoot".
>
> If this is indeed a mistake, we should probably post a correction to 
> the list, as I know Schorsch and a few others have posted copies of 
> the docs on their own sites...
>
> ----
>
>      Rob Guglielmetti
>
> e. rpg@rumblestrip.org
> w. www.rumblestrip.org