--- ray/src/rt/rtrace.c	1993/07/14 10:38:49	2.16
+++ ray/src/rt/rtrace.c	1996/04/17 14:02:09	2.22
@@ -1,4 +1,4 @@
-/* Copyright (c) 1992 Regents of the University of California */
+/* Copyright (c) 1995 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -53,21 +53,29 @@ int  vresolu = 0;			/* vertical resolution */
 double  dstrsrc = 0.0;			/* square source distribution */
 double  shadthresh = .05;		/* shadow threshold */
 double  shadcert = .5;			/* shadow certainty */
-int  directrelay = 1;			/* number of source relays */
+int  directrelay = 2;			/* number of source relays */
 int  vspretest = 512;			/* virtual source pretest density */
 int  directvis = 1;			/* sources visible? */
-double  srcsizerat = .25;		/* maximum ratio source size/dist. */
+double  srcsizerat = .2;		/* maximum ratio source size/dist. */
 
+COLOR  cextinction = BLKCOLOR;		/* global extinction coefficient */
+COLOR  salbedo = BLKCOLOR;		/* 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 */
 
+int  backvis = 1;			/* back face visibility */
+
 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 = 32;			/* ambient resolution */
-int  ambdiv = 128;			/* ambient divisions */
+int  ambres = 128;			/* ambient resolution */
+int  ambdiv = 512;			/* ambient divisions */
 int  ambssamp = 0;			/* ambient super-samples */
 int  ambounce = 0;			/* ambient bounces */
 char  *amblist[128];			/* ambient include/exclude list */
@@ -243,6 +251,7 @@ FVECT  org, dir;
 {
 	VCOPY(thisray.rorg, org);
 	VCOPY(thisray.rdir, dir);
+	thisray.rmax = 0.0;
 	rayorigin(&thisray, NULL, PRIMARY, 1.0);
 	if (castonly)
 		localhit(&thisray, &thescene) || sourcehit(&thisray);