--- ray/doc/notes/ReleaseNotes	2010/03/16 04:44:22	1.167
+++ ray/doc/notes/ReleaseNotes	2010/07/01 21:54:55	1.172
@@ -1725,3 +1725,17 @@ Version 4.1
 Changed ranimate behavior so remote login under a different user
 doesn't necessarily require the presence of the originating user's
 home directory.
+
+Changed standard transmission function normalization back to what
+it was in version 3.5, following recommendation of David Geisler-Moroder,
+who pointed out that the revised BTDF increased too much at grazing.
+
+Changed rad behavior with -N >1 on single view to call rpiece.
+
+Updated SCons build system for MINGW compilation, thanks to Christian
+Kohler.
+
+Added -u option to rlam for unbuffered output.
+
+Modified dctimestep to accept sky vector and daylight coefficient matrix
+or list of images to sum together, as suggested by Andy McNeil.