--- ray/doc/notes/ReleaseNotes	2014/01/24 01:26:44	1.229
+++ ray/doc/notes/ReleaseNotes	2014/02/08 01:28:05	1.231
@@ -1914,3 +1914,13 @@ given on command line.  This simplifies script writing
 utilities consistent with other tools in Radiance.
 
 Added triangulation routine to handle convex polygons in obj2mesh.
+
+****** COMPATIBILITY CHANGE ********
+Made backface visibility apply to all material types, including
+transparent and translucent materials (except dielectric and interface).
+This makes the option useful in cases where adjacent trans surfaces
+are placed next to each other by a modeler that only understands
+volumetric objects.
+
+Changed dctimestep so that output matrices (-n > 1) are preceded by a
+header, and added support for float and double output formats with -o[fd].