--- ray/src/common/bsdf_t.c	2014/03/17 01:53:51	3.32
+++ ray/src/common/bsdf_t.c	2014/03/23 19:24:11	3.34
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char RCSid[] = "$Id: bsdf_t.c,v 3.32 2014/03/17 01:53:51 greg Exp $";
+static const char RCSid[] = "$Id: bsdf_t.c,v 3.34 2014/03/23 19:24:11 greg Exp $";
 #endif
 /*
  *  bsdf_t.c
@@ -804,10 +804,9 @@ SDsampTreCDist(FVECT ioVec, double randX, const SDCDst
 					/* emit from back? */
 	if ((cd->sidef == SD_BREFL) | (cd->sidef == SD_FXMIT))
 		gpos[2] = -gpos[2];
-	if (cd->isodist) {		/* rotate isotropic result */
+	if (cd->isodist) {		/* rotate isotropic sample */
 		rotangle = atan2(-ioVec[1],-ioVec[0]);
-		VCOPY(ioVec, gpos);
-		spinvector(ioVec, ioVec, zvec, rotangle);
+		spinvector(ioVec, gpos, zvec, rotangle);
 	} else
 		VCOPY(ioVec, gpos);
 	return SDEnone;
@@ -849,7 +848,8 @@ load_values(char **spp, float *va, int n)
 	char	*svnext;
 
 	while (n-- > 0 && (svnext = fskip(*spp)) != NULL) {
-		*v++ = atof(*spp);
+		if ((*v++ = atof(*spp)) < 0)
+			v[-1] = 0;
 		*spp = svnext;
 		eat_token(spp, ',');
 	}