--- ray/doc/man/man1/vwrays.1	2005/09/19 04:26:08	1.4
+++ ray/doc/man/man1/vwrays.1	2011/08/20 20:57:51	1.8
@@ -1,10 +1,10 @@
-.\" RCSid "$Id: vwrays.1,v 1.4 2005/09/19 04:26:08 greg Exp $"
+.\" RCSid "$Id: vwrays.1,v 1.8 2011/08/20 20:57:51 greg Exp $"
 .TH VWRAYS 1 1/15/99 RADIANCE
 .SH NAME
 vwrays - compute rays for a given picture or view
 .SH SYNOPSIS
 .B vwrays
-.B "[ -i -f{a|f|d} | -d ]"
+.B "[ -i -u -f{a|f|d} | -d ]"
 {
 .B "view opts .."
 |
@@ -25,6 +25,9 @@ The
 .I \-i
 option may be used to specify desired pixel positions on the standard
 input rather than generating all the pixels for a given view.
+If the
+.I \-u
+option is also given, output will be unbuffered.
 .PP
 The
 .I \-f
@@ -90,8 +93,8 @@ otherwise, which would produce a uniform clipping dist
 .PP
 If a picture is given on the command line rather than a set of view options,
 then the view and image dimensions are taken from the picture file, and
-the reported ray origins and directions will exactly match the center of each
-pixel in the picture.
+the reported ray origins and directions will match the center of each
+pixel in the picture (plus optional jitter).
 .PP
 If a depth buffer file is given as well, then
 .I vwrays
@@ -105,19 +108,19 @@ for light rays leaving the scene surfaces to strike ea
 To compute the ray intersection points and returned directions corresponding
 to a picture and its depth buffer:
 .IP "" .2i
-vwrays scene_v2.pic scene_v2.zbf > scene_v2.pts
+vwrays scene_v2.hdr scene_v2.zbf > scene_v2.pts
 .PP
 To determine what the dimensions of a given view would be:
 .IP "" .2i
-vwrays -d -vf myview.vf -x 2048 -y 2048
+vwrays \-d \-vf myview.vf \-x 2048 \-y 2048
 .PP
 To generate a RADIANCE picture using
 .I rtrace
 instead of
 .I rpict:
 .IP "" .2i
-vwrays -ff -vf view1.vf -x 1024 -y 1024 |
-rtrace `vwrays -d -vf view1.vf -x 1024 -y 1024` -ffc scene.oct > view1.pic
+vwrays \-ff \-vf view1.vf \-x 1024 \-y 1024 |
+rtrace `vwrays \-d \-vf view1.vf \-x 1024 \-y 1024` \-ffc scene.oct > view1.hdr
 .SH AUTHOR
 Greg Ward Larson
 .SH ACKNOWLEDGMENT