--- ray/doc/ray.html 2004/01/01 19:31:44 1.3 +++ ray/doc/ray.html 2010/03/12 18:34:43 1.8 @@ -1,22 +1,20 @@ -The RADIANCE 3.5 Synthetic Imaging System +The RADIANCE 3.8 Synthetic Imaging System -Copyright © 2003 Regents, University of California -

-The RADIANCE 3.5 Synthetic Imaging System +The RADIANCE 3.8 Synthetic Imaging System

-Building Technologies Department
+Building Technologies Program
Lawrence Berkeley National Laboratory
1 Cyclotron Rd., 90-3111
Berkeley, CA 94720
@@ -566,7 +564,7 @@ A material defines the way light interacts with a sur

- Mirror is used for planar surfaces that produce secondary source reflections. + Mirror is used for planar surfaces that produce virtual source reflections. This material should be used sparingly, as it may cause the light source calculation to blow up if it is applied to many small surfaces. This material is only supported for flat surfaces such as polygons and rings. The arguments are simply the RGB reflectance values, which should be between 0 and 1. @@ -589,12 +587,12 @@ This is only appropriate if the surface hides other (m
- The prism1 material is for general light redirection from prismatic glazings, generating secondary light sources. + The prism1 material is for general light redirection from prismatic glazings, generating virtual light sources. It can only be used to modify a planar surface (i.e., a polygon or disk) and should not result in either light concentration or scattering. The new direction of the ray can be on either side of the material, - and the definitions must have the correct bidirectional properties to work properly with secondary light sources. + and the definitions must have the correct bidirectional properties to work properly with virtual light sources. The arguments give the coefficient for the redirected light and its direction. 
@@ -661,7 +659,7 @@ a perfectly scattering medium (no absorption).
 The scattering eccentricity parameter will likewise override the global
 setting if it is present.
 Scattering eccentricity indicates how much scattered light favors the
-forward direction, as fit by the Heyney-Greenstein function:
+forward direction, as fit by the Henyey-Greenstein function:
 
 
 	P(theta) = (1 - g*g) / (1 + g*g - 2*g*cos(theta))^1.5
@@ -1751,7 +1749,7 @@ or converted a standard image format using one of the 
 
 The Radiance Software License, Version 1.0
 
-Copyright (c) 1990 - 2002 The Regents of the University of California,
+Copyright (c) 1990 - 2006 The Regents of the University of California,
 through Lawrence Berkeley National Laboratory.   All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -1824,6 +1822,11 @@ Ecole  Polytechnique  Federale de Lausanne (EPFL Unive