--- ray/src/util/rad.c	2021/01/21 21:36:28	2.128
+++ ray/src/util/rad.c	2023/01/24 21:54:49	2.130
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rad.c,v 2.128 2021/01/21 21:36:28 greg Exp $";
+static const char	RCSid[] = "$Id: rad.c,v 2.130 2023/01/24 21:54:49 greg Exp $";
 #endif
 /*
  * Executive program for oconv, rpict and pfilt
@@ -242,12 +242,18 @@ main(
 				/* load variable values */
 	loadvars(rifname);
 				/* get any additional assignments */
-	for (i++; i < argc; i++)
-		if (setvariable(argv[i], matchvar) < 0) {
-			fprintf(stderr, "%s: unknown variable: %s\n",
+	for (i++; i < argc; i++) {
+		int	rv = setvariable(argv[i], matchvar);
+		if (rv < 0) {
+			fprintf(stderr, "%s: unknown setting: %s\n",
 					progname, argv[i]);
 			quit(1);
 		}
+		if (!rv)
+			fprintf(stderr,
+			"%s: bad variable assignment: %s (ignored)\n",
+					progname, argv[i]);
+	}
 				/* check assignments */
 	checkvalues();
 				/* check files and dates */
@@ -924,7 +930,7 @@ lowqopts(			/* low quality rendering options */
 	d = ambval();
 	sprintf(op, " -av %.2g %.2g %.2g", d, d, d);
 	op += strlen(op);
-	op = addarg(op, "-lr 6 -lw .003");
+	op = addarg(op, "-lr 6 -lw .001");
 }
 
 
@@ -1078,7 +1084,7 @@ hiqopts(				/* high quality rendering options */
 	d = ambval();
 	sprintf(op, " -av %.2g %.2g %.2g", d, d, d);
 	op += strlen(op);
-	op = addarg(op, "-lr 12 -lw 1e-5");
+	op = addarg(op, "-lr 12 -lw 5e-6");
 }