--- ray/src/rt/o_instance.c	1989/04/11 13:30:30	1.2
+++ ray/src/rt/o_instance.c	1989/04/23 19:33:59	1.5
@@ -31,7 +31,6 @@ register RAY  *r;
 	rcont.rno = nrays;
 	rcont.ro = NULL;
 	rcont.rot = FHUGE;
-	rcont.rno = nrays;
 	multp3(rcont.rorg, r->rorg, in->b.xfm);
 	multv3(rcont.rdir, r->rdir, in->b.xfm);
 	for (i = 0; i < 3; i++)
@@ -41,13 +40,15 @@ 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->rofx, in->f.xfm, rcont.rofx);
-		r->rofs = in->f.sca * rcont.rofs;
+		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;
 	}