--- ray/doc/man/man1/rtcontrib.1	2008/10/06 23:00:53	1.19
+++ ray/doc/man/man1/rtcontrib.1	2009/06/14 18:21:58	1.22
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: rtcontrib.1,v 1.19 2008/10/06 23:00:53 greg Exp $"
+.\" RCSid "$Id: rtcontrib.1,v 1.22 2009/06/14 18:21:58 greg Exp $"
 .TH RTCONTRIB 1 5/25/05 RADIANCE
 .SH NAME
 rtcontrib - compute contribution coefficients in a RADIANCE scene
@@ -166,6 +166,12 @@ If the number of bins is known in advance, it should b
 .I \-bn
 option, and this is critical for output files containing multiple values
 per record.
+A variable or constant name may be given for this parameter if
+it has been defined via a previous
+.I \-f
+or
+.I \-e
+option.
 Since bin numbers start from 0, the bin count is always equal to
 the last bin plus 1.
 Set the this value to 0 if the bin count is unknown (the default).
@@ -176,7 +182,7 @@ and
 .I \-o
 options to the left of each
 .I \-m
-setting affect only that modifier.
+setting are the ones used for that modifier.
 The ordering of other options is unimportant, except for
 .I \-x
 and
@@ -276,12 +282,12 @@ contributions:
 .IP "" .2i
 vwrays \-ff \-x 1024 \-y 1024 \-vf best.vf |
 rtcontrib \-ffc `vwrays \-d \-x 1024 \-y 1024 \-vf best.vf`
-@render.opt \-o c_%s.pic \-m light1 \-m light2 scene.oct
+@render.opt \-o c_%s.hdr \-m light1 \-m light2 scene.oct
 .PP
 These images may then be recombined using the desired outputs
 of light1 and light2:
 .IP "" .2i
-pcomb \-c 100 90 75 c_light1.pic \-c 50 55 57 c_light2.pic > combined.pic
+pcomb \-c 100 90 75 c_light1.hdr \-c 50 55 57 c_light2.hdr > combined.hdr
 .PP
 To compute an array of illuminance contributions according to a Tregenza sky:
 .IP "" .2i
@@ -292,5 +298,5 @@ RAYPATH		path to search for \-f and \-M files
 .SH AUTHOR
 Greg Ward
 .SH "SEE ALSO"
-cnt(1), getinfo(1), pcomb(1), pfilt(1), ra_rgbe(1),
+cnt(1), genklemsamp(1), getinfo(1), pcomb(1), pfilt(1), ra_rgbe(1),
 rcalc(1), rpict(1), rtrace(1), total(1), vwrays(1), ximage(1)