--- ray/src/rt/rtrace.c	1995/08/21 10:29:20	2.19
+++ ray/src/rt/rtrace.c	1996/02/14 15:18:12	2.21
@@ -1,4 +1,4 @@
-/* Copyright (c) 1994 Regents of the University of California */
+/* Copyright (c) 1995 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -58,6 +58,11 @@ int  vspretest = 512;			/* virtual source pretest dens
 int  directvis = 1;			/* sources visible? */
 double  srcsizerat = .2;		/* maximum ratio source size/dist. */
 
+COLOR  cextinction = BLKCOLOR;		/* global extinction coefficient */
+double  salbedo = 0.;			/* global scattering albedo */
+double  seccg = 0.;			/* global scattering eccentricity */
+double  ssampdist = 0.;			/* scatter sampling distance */
+
 double  specthresh = .15;		/* specular sampling threshold */
 double  specjitter = 1.;		/* specular sampling jitter */
 
@@ -67,6 +72,7 @@ int  maxdepth = 6;			/* maximum recursion depth */
 double  minweight = 4e-3;		/* minimum ray weight */
 
 COLOR  ambval = BLKCOLOR;		/* ambient value */
+int  ambvwt = 0;			/* initial weight for ambient value */
 double  ambacc = 0.2;			/* ambient accuracy */
 int  ambres = 128;			/* ambient resolution */
 int  ambdiv = 512;			/* ambient divisions */