--- ray/doc/man/man1/mksource.1	2005/04/12 03:30:43	1.1
+++ ray/doc/man/man1/mksource.1	2005/08/19 02:31:07	1.4
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: mksource.1,v 1.1 2005/04/12 03:30:43 greg Exp $"
+.\" RCSid "$Id: mksource.1,v 1.4 2005/08/19 02:31:07 greg Exp $"
 .TH MKSOURCE 1 04/11/05 RADIANCE
 .SH NAME
 mksource - compute distant sources for RADIANCE image-based lighting
@@ -20,7 +20,8 @@ produces a RADIANCE scene description of distant illum
 sources corresponding to bright, concentrated regions in
 the given ambient environment. 
 Any local geometry is ignored in the input octree, which
-should be derived from a captured light probe.
+should be derived from a captured light probe and modeled
+as a distant hemispherical or spherical glow source.
 The output sources may then be combined with this environment
 to produce a more efficient scene for rendering, faster and
 less prone to sampling artifacts.
@@ -29,15 +30,15 @@ The
 .I \-d
 option may be used to specify the number of ray samples, which
 defaults to 262,000.
-Calculation time is roughly proportional to accuracy, and the
-default is fine enough to find sources the size of the sun
+Calculation time is roughly proportional to this setting, and the
+default is fine enough to resolve sources the size of the sun
 (half a degree) or larger.
 .PP
 The
 .I \-t
 option may be used to manually set the radiance threshold for
 sources, in watts/sr/meter^2.
-The default uses the top 1 percentile of the environment, which
+The default uses the top 2 percentile of the environment, which
 is usally a good value.
 .PP
 The