--- ray/doc/ray.1	2020/08/31 21:54:55	1.38
+++ ray/doc/ray.1	2023/05/11 17:18:39	1.39
@@ -1,8 +1,8 @@
-.\" RCSid "$Id: ray.1,v 1.38 2020/08/31 21:54:55 greg Exp $"
+.\" RCSid "$Id: ray.1,v 1.39 2023/05/11 17:18:39 greg Exp $"
 .\" Print using the -ms macro package
-.DA 8/31/2020
+.DA 5/11/2023
 .LP
-.tl """Copyright \(co 2020 Regents, University of California
+.tl """Copyright \(co 2023 Regents, University of California
 .sp 2
 .TL
 The
@@ -630,6 +630,8 @@ arguments have additional flexibility to specify the s
 Also, rather than roughness, specular power is used, which has no
 physical meaning other than larger numbers are equivalent to a smoother
 surface.
+Unlike other material types, total reflectance is the sum of
+diffuse and specular colors, and should be adjusted accordingly.
 .DS
 mod ashik2 id
 4+ ux uy uz funcfile transform