--- ray/doc/man/man1/rtcontrib.1	2005/10/06 16:28:59	1.13
+++ ray/doc/man/man1/rtcontrib.1	2005/10/11 16:54:26	1.14
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: rtcontrib.1,v 1.13 2005/10/06 16:28:59 greg Exp $"
+.\" RCSid "$Id: rtcontrib.1,v 1.14 2005/10/11 16:54:26 greg Exp $"
 .TH RTCONTRIB 1 5/25/05 RADIANCE
 .SH NAME
 rtcontrib - compute contribution coefficients in a RADIANCE scene
@@ -7,6 +7,8 @@ rtcontrib - compute contribution coefficients in a RAD
 [
 .B "\-n nprocs"
 ][
+.B \-fo
+|
 .B \-r
 ][
 .B "\-e expr"
@@ -74,9 +76,12 @@ specification.
 If a destination begins with an exclamation mark ('!'), then
 a pipe is opened to a command and data is sent to its standard input.
 Otherwise, the destination is treated as a file.
-An existing file of the same name is clobbered, unless the
+An existing file of the same name will not be clobbered, unless the
+.I \-fo
+option is given.
+If instead the
 .I \-r
-option is specified, in which case data recovery is attempted.
+option is specified, data recovery is attempted on existing files.
 If an output specification contains a "%s" format, this will be
 replaced by the modifier name.
 The