--- ray/doc/man/man1/genrev.1	2003/12/09 15:59:06	1.2
+++ ray/doc/man/man1/genrev.1	2018/05/04 23:56:49	1.7
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: genrev.1,v 1.2 2003/12/09 15:59:06 greg Exp $"
+.\" RCSid "$Id: genrev.1,v 1.7 2018/05/04 23:56:49 greg Exp $"
 .TH GENREV 1 11/15/93 RADIANCE
 .SH NAME
 genrev - generate a RADIANCE description of surface of revolution
@@ -43,6 +43,9 @@ in any number of
 and
 .I \-f
 options.
+The variable and function definitions in each
+.I \-f source
+file are read and compiled from the RADIANCE library where it is found.
 The
 .I \-s
 option smooths the surfaces using Phong normal interpolation.
@@ -50,11 +53,11 @@ option smooths the surfaces using Phong normal interpo
 To generate a torus with an inner radius of 1 and an outer radius
 of 3:
 .IP "" .2i
-genrev steel torus 'sin(2*PI*t)' '1+cos(2*PI*t)' 32
+genrev steel torus 'sin(2*PI*t)' '2+cos(2*PI*t)' 32
+.SH ENVIRONMENT
+RAYPATH		the directories to check for auxiliary files.
 .SH AUTHOR
 Greg Ward
-.SH BUGS
-The -s option doesn't modify the surface normal correctly
-for the opposite side.
 .SH "SEE ALSO"
-calc(1), genbox(1), gensurf(1), genworm(1), rpict(1), rview(1), xform(1)
+genbox(1), gencat(1), genprism(1), gensurf(1),
+genworm(1), rcalc(1), rpict(1), rvu(1), xform(1)