--- ray/src/rt/rtmain.c	2006/04/05 06:22:57	2.14
+++ ray/src/rt/rtmain.c	2009/06/22 20:52:56	2.17
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rtmain.c,v 2.14 2006/04/05 06:22:57 greg Exp $";
+static const char	RCSid[] = "$Id: rtmain.c,v 2.17 2009/06/22 20:52:56 greg Exp $";
 #endif
 /*
  *  rtmain.c - main for rtrace per-ray calculation program
@@ -309,10 +309,11 @@ main(int  argc, char  *argv[])
 			while ((rval=fork()) == 0) {	/* keep on forkin' */
 				pflock(1);
 				pfhold();
+				ambsync();		/* load new values */
 			}
 			if (rval < 0)
 				error(SYSTEM, "cannot fork child for persist function");
-			pfdetach();		/* parent exits */
+			pfdetach();		/* parent will run then exit */
 		}
 	}
 runagain:
@@ -335,7 +336,6 @@ runagain:
 		}
 	}
 	if (persist == PCHILD) {	/* wait for a signal then go again */
-		close(duped1);			/* release output handle */
 		pfhold();
 		raynum = nrays = 0;		/* reinitialize */
 		goto runagain;
@@ -425,8 +425,8 @@ printdefaults(void)			/* print default values to stdou
 
 	if (imm_irrad)
 		printf("-I+\t\t\t\t# immediate irradiance on\n");
-	printf("-x  %-9d\t\t\t# x resolution (flush interval)\n", hresolu);
-	printf("-y  %-9d\t\t\t# y resolution\n", vresolu);
+	printf("-x %-9d\t\t\t# x resolution (flush interval)\n", hresolu);
+	printf("-y %-9d\t\t\t# y resolution\n", vresolu);
 	printf(lim_dist ? "-ld+\t\t\t\t# limit distance on\n" :
 			"-ld-\t\t\t\t# limit distance off\n");
 	printf("-h%c\t\t\t\t# %s header\n", loadflags & IO_INFO ? '+' : '-',