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Comparing ray/doc/man/man1/gensky.1 (file contents):
Revision 1.1 by greg, Tue Mar 11 19:20:21 2003 UTC vs.
Revision 1.5 by greg, Fri Sep 10 18:19:24 2004 UTC

#	Line 1 | Line 1
1	<	.\" RCSid "$Id"
1	>	.\" RCSid "$Id$"
2		.TH GENSKY 1 4/24/98 RADIANCE
3		.SH NAME
4		gensky - generate a RADIANCE description of the sky
#	Line 77 | Line 77 | For a hemispherical blue sky, the description might be
77		skyfunc glow skyglow
78		0
79		0
80	<	4 .9 .9 1 0
80	>	4 .99 .99 1.1 0
81
82		skyglow source sky
83		0
#	Line 97 | Line 97 | suggests an ambient value in a comment at the beginnin
97		description to use with the
98		.I \-av
99		option of the RADIANCE rendering programs.
100	<	(See rview(1) and rpict(1).)
100	>	(See rvu(1) and rpict(1).)
101		This value is the cosine-weighted radiance of the sky in
102		watts/steradian/meter2.
103		.PP
#	Line 211 | Line 211 | degrees west of Greenwich.
211		(Use negative angle for east.)
212		This is used in the calculation of solar time.
213		Be sure to give the correct longitude also!
214	<	If solar time is given directly, then this option has no effect.
214	>	If a time zone or solar time is given directly, then this option has no effect.
215		.SH EXAMPLE
216		To produce a sunny sky for July 4th at 2:30pm Eastern daylight time at a
217		site latitude of 42 degrees, 89 degrees west longitude:
#	Line 227 | Line 227 | gensky -ang 23 -40 -s
227		.SH AUTHOR
228		Greg Ward
229		.SH "SEE ALSO"
230	<	rpict(1), rview(1), xform(1)
230	>	rpict(1), rvu(1), xform(1)

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