--- ray/doc/man/man1/rtpict.1	2019/07/23 18:17:54	1.3
+++ ray/doc/man/man1/rtpict.1	2022/04/11 04:03:36	1.11
@@ -1,7 +1,7 @@
-.\" RCSid "$Id: rtpict.1,v 1.3 2019/07/23 18:17:54 greg Exp $"
+.\" RCSid "$Id: rtpict.1,v 1.11 2022/04/11 04:03:36 greg Exp $"
 .TH RTPICT 1 3/19/2018 RADIANCE
 .SH NAME
-rtpict - generate a RADIANCE picture or layerd image using rtrace
+rtpict - generate a RADIANCE picture or layered image using rtrace
 .SH SYNOPSIS
 .B rtpict
 .B "-n nproc"
@@ -62,12 +62,12 @@ in the specified directory:
 .sp
 .nf
 v	radiance.hdr
-r	mirrored.hdr
-x	unmirrored.hdr
-l	effective.dpt
-L	firstsurface.dpt
-R	mirrored.dpt
-X	unmirrored.dpt
+r	r_refl.hdr
+x	r_unrefl.hdr
+l	d_effective.dpt
+L	d_firstsurf.dpt
+R	d_refl.dpt
+X	d_unrefl.dpt
 n	perturbed.nrm
 N	unperturbed.nrm
 s	surface.idx
@@ -84,7 +84,8 @@ converted to a 16-bit representation by
 .I rcode_depth(1),
 and the
 .I \-d
-option should be used to assign the reference (median) depth and units.
+option should be used to assign the reference (median) depth and world
+units, which applies to the overall scene.
 Surface normals (from the 'n' and 'N' types) will be converted
 to a 32-bit representation by
 .I rcode_normal(1).
@@ -99,7 +100,7 @@ with the 'v' type will be renamed
 .I "irradiance.hdr"
 and some other output types become irrelevant (i.e., 'r', 'x', 'R', and 'X').
 If one or more of the associated output files already exists in the
-destination directory, it will be overwritten with the new data.
+destination directory, an error will be printed and the command will abort.
 .SH EXAMPLES
 To render a scene with four processes:
 .IP "" .2i
@@ -113,4 +114,4 @@ Greg Ward
 .SH "SEE ALSO"
 getinfo(1), mkpmap(1), oconv(1), pfilt(1), 
 pvalue(1), rad(1), rcode_depth(1), rcode_normal(1), rcode_ident(1),
-rpiece(1), rpict(1), rsplit(1), rtrace(1), rvu(1), vwrays(1),
+rcrop(1), rpiece(1), rpict(1), rsplit(1), rtrace(1), rvu(1), vwrays(1)