--- ray/src/util/trad.hlp	1995/08/18 10:34:56	2.12
+++ ray/src/util/trad.hlp	1995/10/05 13:03:04	2.16
@@ -1,4 +1,4 @@
-	$Id: trad.hlp,v 2.12 1995/08/18 10:34:56 greg Exp $
+	$Id: trad.hlp,v 2.16 1995/10/05 13:03:04 greg Exp $
 
 This help file is associated with the trad interface to the Radiance
 rad(1) program.  Trad consists of trad.wsh and one do_*.tcl file for
@@ -490,7 +490,7 @@ tot_flux is given in watts.
 (Divide total lumens by 179 lumens/watt to get watts.)
 
 The exposure value may either be given as a positive real value, or
-as a real value preceeded by a '+' or '-' indicating a positive or
+as a real value preceded by a '+' or '-' indicating a positive or
 negative number of f-stops (powers of two) from the original value.
 
 If no exposure is given, pfilt will automatically compute the
@@ -707,7 +707,7 @@ The standard view up vector may be set to the positive
 the positive Y axis (+Y), the positive Z axis (+Z), the negative
 X axis (-X), the negative Y axis (-Y), or the negative Z axis (-Z).
 
-This setting may always be overriden by the "-vu xd yd zd" option,
+This setting may always be overridden by the "-vu xd yd zd" option,
 and will be altered for a particular view if it happens to be
 parallel to the view direction.
 
@@ -746,17 +746,41 @@ to maintain a specific pixel aspect ratio (1 by defaul
 
 The default value for this variable is "512".
 
-.Views.Rawsave
+.Views.Rawfile
 
-The "Rawsave" check box determines whether or not the raw output picture
+The "Rawfile" entry window determines if and where the raw output picture
 from rpict will be saved.
-The default action (box unchecked) is to remove this file, since it
+If the entry is empty, the file will be removed after rendering and
+filtering.
+This is the normal action, since the raw file
 takes up disk space and is not generally useful.
-However, if you wish to perform some special filtering function on
-the file, this file can be renamed instead of removed by checking this box.
-The final name in this case will be the same as the finished
-picture, except with a ".rwp" suffix.
+However, if you wish to perform some special filtering function,
+this file can be renamed instead of removed by giving a
+root file name in this entry window.
+The final name in this case will be the given root plus and
+underscore plus the view name followed by a ".pic" suffix.
 
+In the special case when the raw file name and picture file name are
+the same, the raw file is saved and no filtering takes place.
+
+.Views.Zfile
+
+The "Zfile" entry window gives the root name of the file in which to
+store the raw (binary floating point) distances to pixels in the
+original generated image.
+If this entry is empty, then no z-file will be saved.
+
+The final z-file name will be the given root plus an underscore plus
+the view name plus a ".zbf" suffix.
+
+To convert this image to human-readable form, the program "od" will
+work on some systems, or the Radiance "pvalue" program may be used
+to first convert it to a greyscale Radiance picture using the
+options "-r -h -b -df `getinfo -d < pictname`" where "pictname" is
+replaced by the raw picture file name.
+(Getinfo simply gets the original image dimensions, which are not
+stored in the z-file.)
+
 .Views.Copy
 
 The "Copy" button in the Views screen permits those variables
@@ -1246,6 +1270,8 @@ has completed since the Results screen was brought up.
 
 The "Delete" button on the Results screen is used to remove the
 selected picture files from the filesystem.
+Associated raw picture and z-buffer files
+will also be deleted if they exist.
 Verification is required before any action is taken.
 
 .Results.Display
@@ -1333,10 +1359,13 @@ details.)
 The print command window on the Results screen contains the system
 command to use in printing out finished Radiance pictures.
 The "%s" format field, which must appear somewhere in the command,
-is replaced by the selected Radiance picture file name(s).
+is replaced by the selected Radiance picture file name.
+This command is executed multiple times if multiple files are
+selected.
 
 The default command is "ra_ps %s | lpr", which converts the Radiance
 picture to a black and white PostScript file and sends it to the lpr
 print spooler.
+Add a "-c" option to "ra_ps" if the printer supports color.
 If your printer does not understand PostScript, or your system does
 not support lpr, this command must obviously be changed.