--- ray/src/rt/ambcomp.c	1991/06/13 12:00:29	1.7
+++ ray/src/rt/ambcomp.c	1991/07/11 16:39:00	1.9
@@ -72,9 +72,9 @@ RAY  *r;
 	hlist[1] = dp->t;
 	hlist[2] = dp->p;
 	hlist[3] = 0;
-	zd = sqrt((dp->t+urand(ilhash(hlist,4)+dp->n))/h->nt);
+	zd = sqrt((dp->t+urand(urind(ilhash(hlist,4),dp->n)))/h->nt);
 	hlist[3] = 1;
-	phi = 2.0*PI * (dp->p+urand(ilhash(hlist,4)+dp->n))/h->np;
+	phi = 2.0*PI * (dp->p+urand(urind(ilhash(hlist,4),dp->n)))/h->np;
 	xd = cos(phi) * zd;
 	yd = sin(phi) * zd;
 	zd = sqrt(1.0 - zd*zd);
@@ -86,7 +86,7 @@ RAY  *r;
 	rayvalue(&ar);
 	ndims--;
 	addcolor(dp->v, ar.rcol);
-	if (ar.rt < FHUGE)
+	if (ar.rt > FTINY && ar.rt < FHUGE)
 		dp->r += 1.0/ar.rt;
 					/* (re)initialize error */
 	if (dp->n++) {