--- ray/src/rt/raycalls.c	2005/06/14 02:46:30	2.13
+++ ray/src/rt/raycalls.c	2005/06/21 00:26:44	2.15
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: raycalls.c,v 2.13 2005/06/14 02:46:30 greg Exp $";
+static const char	RCSid[] = "$Id: raycalls.c,v 2.15 2005/06/21 00:26:44 greg Exp $";
 #endif
 /*
  *  raycalls.c - interface for running Radiance rendering as a library
@@ -90,6 +90,7 @@ static const char	RCSid[] = "$Id: raycalls.c,v 2.13 20
  */
 
 #include <string.h>
+#include <time.h>
 
 #include  "ray.h"
 #include  "source.h"
@@ -164,6 +165,7 @@ ray_init(			/* initialize ray-tracing calculation */
 	if (ofun[OBJ_SPHERE].funp == o_default)
 		initotypes();
 					/* initialize urand */
+	srandom(rand_samp ? (long)time(0) : 0L);
 	initurand(2048);
 					/* read scene octree */
 	readoct(octname = otnm, ~(IO_FILES|IO_INFO), &thescene, NULL);