--- ray/src/rt/o_instance.c	1989/02/02 10:41:32	1.1
+++ ray/src/rt/o_instance.c	1989/04/20 08:25:22	1.4
@@ -41,13 +41,17 @@ register RAY  *r;
 		return(0);		/* missed */
 	if (rcont.rot * in->f.sca >= r->rot)
 		return(0);		/* not close enough */
-					/* if we have modifier, use it */
-	if (o->omod != OVOID)
+
+	if (o->omod != OVOID) {		/* if we have modifier, use it */
 		r->ro = o;
-	else {				/* else use theirs */
+		r->rofs = 1.0; setident4(r->rofx);
+		r->robs = 1.0; setident4(r->robx);
+	} else {			/* else use theirs */
 		r->ro = rcont.ro;
-		multmat4(r->rox, in->b.xfm, rcont.rox);
-		r->ros = in->b.sca * rcont.ros;
+		multmat4(r->rofx, rcont.rofx, in->f.xfm);
+		r->rofs = rcont.rofs * in->f.sca;
+		multmat4(r->robx, in->b.xfm, rcont.robx);
+		r->robs = in->b.sca * rcont.robs;
 	}
 					/* transform it back */
 	r->rot = rcont.rot * in->f.sca;