--- ray/src/util/genBSDF.pl	2015/04/01 01:38:35	2.56
+++ ray/src/util/genBSDF.pl	2015/04/02 17:42:46	2.57
@@ -1,5 +1,5 @@
 #!/usr/bin/perl -w
-# RCSid $Id: genBSDF.pl,v 2.56 2015/04/01 01:38:35 greg Exp $
+# RCSid $Id: genBSDF.pl,v 2.57 2015/04/02 17:42:46 greg Exp $
 #
 # Compute BSDF based on geometry and material description
 #
@@ -9,7 +9,7 @@ use strict;
 my $windoz = ($^O eq "MSWin32" or $^O eq "MSWin64");
 use File::Temp qw/ :mktemp  /;
 sub userror {
-	print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-W][-t{3|4} Nlog2][-r \"ropts\"][-f \"x=string;y=string\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}C][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom units] [input ..]\n";
+	print STDERR "Usage: genBSDF [-n Nproc][-c Nsamp][-W][-t{3|4} Nlog2][-r \"ropts\"][-s \"x=string;y=string\"][-dim xmin xmax ymin ymax zmin zmax][{+|-}C][{+|-}f][{+|-}b][{+|-}mgf][{+|-}geom units] [input ..]\n";
 	exit 1;
 }
 my ($td,$radscn,$mgfscn,$octree,$fsender,$bsender,$receivers,$facedat,$behinddat,$rmtmp);