--- ray/doc/man/man1/mkillum.1	2008/11/10 19:08:17	1.9
+++ ray/doc/man/man1/mkillum.1	2012/10/13 20:15:43	1.11
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: mkillum.1,v 1.9 2008/11/10 19:08:17 greg Exp $"
+.\" RCSid "$Id: mkillum.1,v 1.11 2012/10/13 20:15:43 greg Exp $"
 .TH MKILLUM 1 10/6/95 RADIANCE
 .SH NAME
 mkillum - compute illum sources for a RADIANCE scene
@@ -172,25 +172,6 @@ If
 is zero, then a diffuse source is assumed and no distribution is
 created.
 .TP
-.BI d =string
-Set the surface Bidirectional Scattering Distribution Function (BSDF)
-to the given file.
-The RADIANCE library path will be searched if the file does not begin
-with a '.' or '~' character.
-This file must contain an LBNL Window 6 XML specification of a valid
-BSDF for the given surface, and all rays will be interpreted through
-this function.
-The orientation of the BSDF may be controlled with the
-.I u
-setting, described below.
-The thickness of the surface may be controlled with the
-.I t
-setting.
-If this variable has no setting or an integer is specified,
-.I mkillum
-returns to the default behavior of computing the output distribution
-directly.
-.TP
 .BI s =integer
 Set the number of ray samples per direction to
 .I integer.
@@ -212,24 +193,19 @@ as its alternate material.
 The default is
 .I l-.
 .TP
-.BI u =[+|-]{X|Y|Z}
-The given axis will be considered "up" for the purposes of interpreting
-BSDF data specified with the
-.I d
-variable.
-The BSDF will be reoriented relative to the surface as necessary to keep
-the up vector in the vertical plane that contains this axis and the
-surface normal, corresponding to an azimuth of 90 degrees.
-The default up vector is +Z.
-.TP
 .BI t =real
 Set the surface thickness to
 .I real
 in world coordinates.
 This value is used for determining where to start rays that need to begin
-on the opposite side of the surface, specifically to compute the incoming
-distribution for a BSDF computation.
-The default value is 0.
+on the opposite side of a fenestration system, specifically
+to compute the incoming distribution for a BSDF computation.
+If the thickness is set to 0 and a BSDF contains detailed geometry,
+it will be translated and output as part of the new description, provided the
+.I l-
+option is also in effect.
+(This currently works only for rectangular polygons.)\0
+The default thickness is 0.
 .SH EXAMPLES
 The following command generates illum's corresponding to geometry
 in the files "it1.rad" and "it2.rad":
@@ -246,4 +222,4 @@ Greg Ward
 Work on this program was initiated and sponsored by the LESO
 group at EPFL in Switzerland.
 .SH "SEE ALSO"
-oconv(1), rad(1), rpict(1), rtrace(1), rvu(1)
+genBSDF(1), oconv(1), rad(1), rpict(1), rtrace(1), rvu(1)