--- ray/src/rt/preload.c	2013/11/08 17:11:42	2.13
+++ ray/src/rt/preload.c	2017/07/14 23:19:32	2.14
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: preload.c,v 2.13 2013/11/08 17:11:42 greg Exp $";
+static const char	RCSid[] = "$Id: preload.c,v 2.14 2017/07/14 23:19:32 greg Exp $";
 #endif
 /*
  * Preload associated object structures to maximize memory sharing.
@@ -28,8 +28,11 @@ load_os(			/* load associated data for object */
 	OBJREC	*op
 )
 {
-	DATARRAY  *dp;
+	DATARRAY	*dp;
+	SDData		*sd;
 
+	SDretainSet = SDretainAll;
+
 	switch (op->otype) {
 	case OBJ_FACE:		/* polygon */
 		getface(op);
@@ -104,7 +107,8 @@ load_os(			/* load associated data for object */
 		if (op->oargs.nsargs < 6)
 			goto sargerr;
 		getfunc(op, 5, 0x1d, 1);
-		loadBSDF(op->oargs.sarg[1]);
+		sd = loadBSDF(op->oargs.sarg[1]);
+		if (sd != NULL) SDfreeCache(sd);
 		return(1);
 	case MAT_PDATA:		/* plastic BRDF data */
 	case MAT_MDATA:		/* metal BRDF data */