--- ray/src/rt/rcontrib.c	2012/06/10 05:25:42	2.2
+++ ray/src/rt/rcontrib.c	2012/06/15 00:57:40	2.6
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: rcontrib.c,v 2.2 2012/06/10 05:25:42 greg Exp $";
+static const char RCSid[] = "$Id: rcontrib.c,v 2.6 2012/06/15 00:57:40 greg Exp $";
 #endif
 /*
  * Accumulate ray contributions for a set of materials
@@ -25,7 +25,7 @@ void	(*trace)() = trace_contrib;
 
 int	do_irrad = 0;			/* compute irradiance? */
 
-int	rand_samp = 0;			/* pure Monte Carlo sampling? */
+int	rand_samp = 1;			/* pure Monte Carlo sampling? */
 
 double	dstrsrc = 0.0;			/* square source distribution */
 double	shadthresh = .03;		/* shadow threshold */
@@ -45,8 +45,8 @@ double	specjitter = 1.;		/* specular sampling jitter *
 
 int	backvis = 1;			/* back face visibility */
 
-int	maxdepth = 8;			/* maximum recursion depth */
-double	minweight = 5e-4;		/* minimum ray weight */
+int	maxdepth = -10;			/* maximum recursion depth */
+double	minweight = 2e-3;		/* minimum ray weight */
 
 char	*ambfile = NULL;		/* ambient file name */
 COLOR	ambval = BLKCOLOR;		/* ambient value */
@@ -63,66 +63,15 @@ int	account;			/* current accumulation count */
 RNUMBER	raysleft;			/* number of rays left to trace */
 long	waitflush;			/* how long until next flush */
 
-int	lastray = 0;			/* last ray number sent */
-int	lastdone = 0;			/* last ray output */
+RNUMBER	lastray = 0;			/* last ray number sent */
+RNUMBER	lastdone = 0;			/* last ray output */
 
-/* Close output stream and free record */
-static void
-closestream(void *p)
-{
-	STREAMOUT	*sop = (STREAMOUT *)p;
-	int		status = 0;
-	if (sop->outpipe)
-		status = pclose(sop->ofp);
-	else if (sop->ofp != stdout)
-		status = fclose(sop->ofp);
-	if (status)
-		error(SYSTEM, "error closing output stream");
-	free(p);
-}
-
-LUTAB	ofiletab = LU_SINIT(free,closestream);	/* output file table */
-
-#define OF_MODIFIER	01
-#define OF_BIN		02
-
 static void mcfree(void *p) { epfree((*(MODCONT *)p).binv); free(p); }
 
 LUTAB	modconttab = LU_SINIT(NULL,mcfree);	/* modifier lookup table */
 
-static OBJECT		traset[MAXTSET+1]={0};	/* trace include set */
-
 /************************** INITIALIZATION ROUTINES ***********************/
 
-void
-tranotify(			/* record new modifier */
-	OBJECT	obj
-)
-{
-	static int	hitlimit = 0;
-	OBJREC		*o = objptr(obj);
-	int		i;
-
-	if (obj == OVOID) {		/* starting over */
-		traset[0] = 0;
-		hitlimit = 0;
-		return;
-	}
-	if (hitlimit || !ismodifier(o->otype))
-		return;
-	for (i = nmods; i-- > 0; )
-		if (!strcmp(o->oname, modname[i])) {
-			if (traset[0] >= MAXTSET) {
-				error(WARNING, "too many same-named modifiers");
-				hitlimit++;
-				return;		/* should this be fatal? */
-			}
-			insertelem(traset, obj);
-			break;
-		}
-}
-
-
 char *
 formstr(				/* return format identifier */
 	int  f
@@ -232,14 +181,6 @@ rcinit()
 	if ((nproc > 1) & (accumulate <= 0))
 		put_zero_record(0);	/* prime our queue to accumulate */
 
-	if (recover) {			/* recover previous output? */
-		if (accumulate <= 0) {
-			reload_output();
-			if (nproc > 1)
-				queue_modifiers();
-		} else
-			recover_output();
-	}
 	if (yres > 0) {			/* set up flushing & ray counts */
 		if (xres > 0)
 			raysleft = (RNUMBER)xres*yres;
@@ -254,9 +195,20 @@ rcinit()
 	for (i = 0; i < nsources; i++)
 		source[i].sflags |= SFOLLOW;
 
-	if (nproc == 1 || in_rchild())	/* single process or child */
+	if (nproc > 1 && in_rchild())	/* forked child? */
 		return;			/* return to main processing loop */
 
+	if (recover) {			/* recover previous output? */
+		if (accumulate <= 0) {
+			reload_output();
+			if (nproc > 1)
+				queue_modifiers();
+		} else
+			recover_output();
+	}
+	if (nproc == 1)			/* single process? */
+		return;
+
 	parental_loop();		/* else run controller */
 	quit(0);			/* parent musn't return! */
 }
@@ -271,13 +223,13 @@ trace_contrib(RAY *r)
 	int	bn;
 	RREAL	contr[3];
 
-	if (r->ro == NULL || !inset(traset, r->ro->omod))
+	if (r->ro == NULL || r->ro->omod == OVOID)
 		return;
 
 	mp = (MODCONT *)lu_find(&modconttab,objptr(r->ro->omod)->oname)->data;
 
-	if (mp == NULL)
-		error(CONSISTENCY, "unexpected modifier in trace_contrib()");
+	if (mp == NULL)				/* not in our list? */
+		return;
 
 	worldfunc(RCCONTEXT, r);		/* get bin number */
 	bn = (int)(evalue(mp->binv) + .5);
@@ -370,7 +322,7 @@ rcontrib()
 #endif
 	while (getvec(orig) == 0 && getvec(direc) == 0) {
 		d = normalize(direc);
-		if ((d == 0.0) & (accumulate != 1)) {
+		if (nchild != -1 && (d == 0.0) & (accumulate != 1)) {
 			if (!ignore_warning_given++)
 				error(WARNING,
 				"dummy ray(s) ignored during accumulation\n");
@@ -382,6 +334,7 @@ rcontrib()
 		if (d == 0.0) {				/* zero ==> flush */
 			if ((yres <= 0) | (xres <= 0))
 				waitflush = 1;		/* flush right after */
+			account = 1;
 		} else {				/* else compute */
 			eval_ray(orig, direc, lim_dist ? d : 0.0);
 		}
@@ -390,7 +343,7 @@ rcontrib()
 		if (raysleft && !--raysleft)
 			break;		/* preemptive EOI */
 	}
-	if (accumulate <= 0 || account < accumulate) {
+	if (nchild != -1 && (accumulate <= 0) | (account < accumulate)) {
 		if (account < accumulate) {
 			error(WARNING, "partial accumulation in final record");
 			accumulate -= account;