--- ray/src/rt/ambient.c	1992/03/04 16:52:13	2.3
+++ ray/src/rt/ambient.c	1992/04/10 16:14:34	2.4
@@ -60,6 +60,8 @@ int  ar;
 		if (maxarad > thescene.cusize / 2.0)
 			maxarad = thescene.cusize / 2.0;
 	}
+	if (maxarad <= FTINY)
+		maxarad = .001;
 }