--- ray/doc/man/man1/gensdaymtx.1	2025/03/27 01:26:55	1.3
+++ ray/doc/man/man1/gensdaymtx.1	2025/04/10 23:30:58	1.4
@@ -1,4 +1,4 @@
-.\" RCSid $Id: gensdaymtx.1,v 1.3 2025/03/27 01:26:55 greg Exp $
+.\" RCSid $Id: gensdaymtx.1,v 1.4 2025/04/10 23:30:58 greg Exp $
 .TH GENSDAYMTX 1 01/19/13 RADIANCE
 .SH NAME
 gensdaymtx - generate an annual spectral sky matrix from a weather tape
@@ -25,6 +25,8 @@ gensdaymtx - generate an annual spectral sky matrix fr
 ]
 [
 .B "tape.wea"
+or
+.B "tape.epw"
 ]
 .SH DESCRIPTION
 .I Gensdaymtx
@@ -36,7 +38,8 @@ tool, the Perez sky model is not used.
 The weather tape is assumed to be in a special form of the .wea file, which contains 
 a short header with the site parameters followed
 by the month, day, standard time, direct normal and diffuse horizontal
-irradiance values, total cloud cover, and broadband aerosol optical depth, one time step per line.
+illuminance values, total cloud cover, and broadband aerosol optical depth, one time step per line.
+Alternatively, a standard EPW (EnergyPlus Weather) file may be provided.
 Such file can be generated by 
 .I epw2wea 
 with the