--- ray/doc/ray.1	2006/10/17 21:52:43	1.10
+++ ray/doc/ray.1	2010/03/12 18:34:43	1.15
@@ -1,8 +1,8 @@
 .\" RCSid "$Id"
 .\" Print using the -ms macro package
-.DA 1/20/99
+.DA 4/30/2008
 .LP
-.tl """Copyright \(co 2006 Regents, University of California
+.tl """Copyright \(co 2008 Regents, University of California
 .sp 2
 .TL
 The
@@ -491,7 +491,7 @@ a perfectly scattering medium (no absorption).
 The scattering eccentricity parameter will likewise override the global
 setting if it is present.
 Scattering eccentricity indicates how much scattered light favors the
-forward direction, as fit by the Heyney-Greenstein function:
+forward direction, as fit by the Henyey-Greenstein function:
 .DS
 P(theta) = (1 - g*g) / (1 + g*g - 2*g*cos(theta))^1.5
 .DE
@@ -1109,10 +1109,6 @@ which serves as a form of opacity control when used wi
 Vname is the coefficient defined in funcfile that determines the influence
 of foreground.
 The background coefficient is always (1-vname).
-Since the references are not resolved until runtime, the last
-definitions of the modifier id's will be used.
-This can result in modifier loops, which are detected by the
-renderer.
 .LP
 .UL Mixdata
 .PP
@@ -1239,9 +1235,8 @@ If no file is needed by a given primitive because all 
 variables are global, a period (`.') can be given in
 place of the file name.
 It is also possible to give an expression instead of a straight
-variable name in a scene file, although such expressions should
-be kept simple if possible.
-Also, functions (requiring parameters)
+variable name in a scene file.
+Functions (requiring parameters)
 must be given as names and not as expressions.
 .PP
 Constant expressions are used as an optimization in function
@@ -1433,7 +1428,7 @@ License
 .DS
 The Radiance Software License, Version 1.0
 
-Copyright (c) 1990 - 2002 The Regents of the University of California,
+Copyright (c) 1990 - 2008 The Regents of the University of California,
 through Lawrence Berkeley National Laboratory.   All rights reserved.
 
 Redistribution and use in source and binary forms, with or without