--- ray/doc/man/man1/pcomb.1	2003/03/11 19:20:21	1.1
+++ ray/doc/man/man1/pcomb.1	2003/12/09 15:59:06	1.4
@@ -1,7 +1,7 @@
-.\" RCSid "$Id"
+.\" RCSid "$Id: pcomb.1,v 1.4 2003/12/09 15:59:06 greg Exp $"
 .TH PCOMB 1 8/31/96 RADIANCE
 .SH NAME
-pcomb - combine RADIANCE pictures.
+pcomb - combine RADIANCE pictures
 .SH SYNOPSIS
 .B pcomb
 [
@@ -85,7 +85,11 @@ The constant
 gives the number of input files present,
 and
 .I WE
-gives the white efficacy (lumens/brightness) for pixel values.
+gives the white efficacy (lumens/brightness) for pixel values,
+which may be used with the
+.I \-o
+option or the le(n) values to convert to absolute
+photometric units (see below).
 The variables
 .I x
 and