--- ray/doc/man/man1/rcomb.1	2023/12/18 23:04:05	1.2
+++ ray/doc/man/man1/rcomb.1	2023/12/19 00:39:03	1.3
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: rcomb.1,v 1.2 2023/12/18 23:04:05 greg Exp $"
+.\" RCSid "$Id: rcomb.1,v 1.3 2023/12/19 00:39:03 greg Exp $"
 .TH RCOMB 12/5/2023 RADIANCE
 .SH NAME
 rcomb - combine and convert matrices a row at a time
@@ -144,6 +144,9 @@ option is given, the output will be written as a RGBE 
 Note that conversion from a float or RGBE color space applies a conversion
 of 179 lumens/watt (for CIE or melanopic output) or 412 (for scotopic output),
 and the reverse happens for conversion from XYZE input to RGB or RGBE output.
+Lower case versions of all these components are also supported, the only
+difference is that the aforementioned efficacy factors
+will be left out of the conversion.
 .PP
 If a matrix or picture file path is given to the
 .I \-c