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Comparing ray/doc/ray.1 (file contents):
Revision 1.14 by greg, Wed Apr 30 22:00:28 2008 UTC vs.
Revision 1.16 by greg, Fri Mar 12 18:43:30 2010 UTC

# Line 1 | Line 1
1   .\" RCSid "$Id"
2   .\" Print using the -ms macro package
3 < .DA 4/30/2008
3 > .DA 3/12/2010
4   .LP
5 < .tl """Copyright \(co 2008 Regents, University of California
5 > .tl """Copyright \(co 2010 Regents, University of California
6   .sp 2
7   .TL
8   The
# Line 491 | Line 491 | a perfectly scattering medium (no absorption).
491   The scattering eccentricity parameter will likewise override the global
492   setting if it is present.
493   Scattering eccentricity indicates how much scattered light favors the
494 < forward direction, as fit by the Heyney-Greenstein function:
494 > forward direction, as fit by the Henyey-Greenstein function:
495   .DS
496   P(theta) = (1 - g*g) / (1 + g*g - 2*g*cos(theta))^1.5
497   .DE

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