--- ray/src/rt/ambient.c	1991/11/12 17:09:42	2.1
+++ ray/src/rt/ambient.c	1992/01/15 10:36:42	2.2
@@ -192,7 +192,7 @@ double  s;
 		 *  Jittering final test reduces image artifacts.
 		 */
 		wt = sqrt(e1) + sqrt(e2);
-		wt *= .9 + .2*frandom();
+		wt *= .9 + .2*urand(9015+samplendx);
 		if (wt > ambacc)
 			continue;
 		if (wt <= 1e-3)