--- ray/src/gen/mkillum2.c	1994/01/07 14:51:46	2.6
+++ ray/src/gen/mkillum2.c	1997/07/09 11:24:52	2.8
@@ -1,4 +1,4 @@
-/* Copyright (c) 1991 Regents of the University of California */
+/* Copyright (c) 1995 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -163,8 +163,8 @@ char  *nm;
 		nalt = nazi = 1;
 	else {
 		n = 4.*PI * il->sampdens;
-		nalt = sqrt(n/PI) + .5;
-		nazi = PI*nalt + .5;
+		nalt = sqrt(2./PI*n) + .5;
+		nazi = PI/2.*nalt + .5;
 	}
 	n = nalt*nazi;
 	distarr = (float *)calloc(n, 3*sizeof(float));
@@ -306,9 +306,9 @@ register struct rtproc  *rt;
 	bzero(rt->buf+6*rt->nrays, 6*sizeof(float));
 	errno = 0;
 	if ( process(rt->pd, (char *)rt->buf, (char *)rt->buf,
-			3*sizeof(float)*rt->nrays,
+			3*sizeof(float)*(rt->nrays+1),
 			6*sizeof(float)*(rt->nrays+1)) <
-			3*sizeof(float)*rt->nrays )
+			3*sizeof(float)*(rt->nrays+1) )
 		error(SYSTEM, "error reading from rtrace process");
 	i = rt->nrays;
 	while (i--) {