--- ray/src/rt/glass.c	1996/04/11 15:59:56	2.8
+++ ray/src/rt/glass.c	2003/02/25 02:47:22	2.11
@@ -1,15 +1,12 @@
-/* Copyright (c) 1991 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: glass.c,v 2.11 2003/02/25 02:47:22 greg Exp $";
 #endif
-
 /*
  *  glass.c - simpler shading function for thin glass surfaces.
- *
- *     11/14/86
  */
 
+#include "copyright.h"
+
 #include  "ray.h"
 
 #include  "otypes.h"
@@ -26,7 +23,7 @@ static char SCCSid[] = "$SunId$ LBL";
  *	modifier glass id
  *	0
  *	0
- *	3 red grn blu
+ *	3+ red grn blu [refractive_index]
  *
  *  The color is used for the transmission at normal incidence.
  *  To compute transmissivity (tn) from transmittance (Tn) use: