--- ray/doc/man/man1/xshowtrace.1	2003/03/11 19:20:21	1.1
+++ ray/doc/man/man1/xshowtrace.1	2005/04/19 18:44:21	1.4
@@ -1,4 +1,4 @@
-.\" RCSid "$Id"
+.\" RCSid "$Id: xshowtrace.1,v 1.4 2005/04/19 18:44:21 greg Exp $"
 .TH XSHOWTRACE 1 11/15/93 RADIANCE
 .SH NAME
 xshowtrace - interactively show rays traced on RADIANCE image under X11
@@ -7,6 +7,8 @@ xshowtrace - interactively show rays traced on RADIANC
 [
 .B \-s
 ][
+.B \-T
+][
 .B "rtrace options"
 ]
 .B octree
@@ -19,7 +21,7 @@ and displays it on an X11 window server using
 The picture should have been created from a previous
 .I rpict(1)
 or
-.I rview(1)
+.I rvu(1)
 calculation using the given octree.
 Once the image is displayed, the user can use the 't' command of
 .I ximage
@@ -32,6 +34,9 @@ The
 .I \-s
 option slows the display of each ray traced to make it easier to
 follow the process.
+The
+.I \-T
+option traces rays to light sources, which are normally hidden.
 .SH AUTHOR
 Greg Ward
 .SH BUGS
@@ -39,4 +44,4 @@ If the pointer is moved between the time 't' is presse
 .I xshowtrace
 starts drawing rays, the rays will be displaced.
 .SH "SEE ALSO"
-oconv(1), rpict(1), rtrace(1), rview(1), ximage(1)
+oconv(1), rpict(1), rtrace(1), rvu(1), ximage(1)