--- ray/src/rt/rv2.c	1992/01/17 09:27:17	2.6
+++ ray/src/rt/rv2.c	1992/03/04 16:52:10	2.8
@@ -297,7 +297,7 @@ char  *s;
 			e *= atof(cp);
 	}
 	if (p != NULL) {		/* relative setting */
-		if (bright(p->v) <= FTINY) {
+		if (bright(p->v) < 1e-25) {
 			error(COMMAND, "cannot normalize to zero");
 			return;
 		}
@@ -386,7 +386,6 @@ register char  *s;
 	extern double  shadcert;
 	extern COLOR  ambval;
 	extern double  ambacc;
-	extern double  minarad;
 	extern int  ambres;
 	extern int  ambdiv;
 	extern int  ambssamp;
@@ -464,8 +463,7 @@ register char  *s;
 			break;
 		case 'r':
 			if (getparam(s+2, "ambient resolution", 'i', &ambres))
-				minarad = ambres > 0 ?
-						thescene.cusize/ambres : 0.0;
+				setambres(ambres);
 			break;
 		default:
 			goto badparam;