--- ray/doc/man/man1/mkpmap.1	2017/03/30 11:54:53	1.4
+++ ray/doc/man/man1/mkpmap.1	2017/03/30 11:58:17	1.5
@@ -1,5 +1,5 @@
-.\" RCSid "$Id: mkpmap.1,v 1.4 2017/03/30 11:54:53 rschregle Exp $"
-.TH MKPMAP 1 "$Date: 2017/03/30 11:54:53 $ $Revision: 1.4 $" RADIANCE
+.\" RCSid "$Id: mkpmap.1,v 1.5 2017/03/30 11:58:17 rschregle Exp $"
+.TH MKPMAP 1 "$Date: 2017/03/30 11:58:17 $ $Revision: 1.5 $" RADIANCE
 
 .SH NAME
 mkpmap - generate RADIANCE photon map
@@ -210,6 +210,7 @@ with the \fB\-apv\fR option. See \fIrpict(1)\fR for de
 .IP "\fB\-n \fInproc\fR"
 Use \fInproc\fR processes for parallel photon distribution. There is no
 benefit in specifying more than the number of physical CPU cores available.
+This option is currently not available on Windows.
 
 .IP "\fB\-t \fIinterval\fR"
 Output a progress report every \fIinterval\fR seconds. This includes