--- ray/doc/notes/ReleaseNotes	2021/01/15 23:16:06	1.380
+++ ray/doc/notes/ReleaseNotes	2021/02/12 01:04:39	1.383
@@ -2395,4 +2395,20 @@ Added "test" target to makeall to run unit tests.
 
 Modified bsdf2ttree to allow different parameters per input SIR file.
 
-Fixed issues with very large matrix files (> 2GB) in dctimestep, rmtxop, and rcollate.
+Fixed issues with very large matrix files (> 2GB) in dctimestep, rmtxop,
+and rcollate.
+
+Added -rf and -rb options to rmtxop to load front or back reflectance
+matrix data from XML file rather than transmission.  (Lars Grobe suggested.)
+
+Improved behavior for coincident surfaces with different materials.
+Rather than returning one surface or the other based on floating-point
+vagaries, opaque materials are now preferred over transparent ones.
+If the materials are both transparent or both opaque, then whichever
+surface appeared later in the scene description will be selected.
+This came of a request for consistent behavior with legal CAD output
+from Peter Apian-Bennewitz.
+
+Added explicit tests for on-edge intersections with polygons.  This should
+eliminate stray rays and tiny light leaks that often appear even in
+well-constructed geometry.