--- ray/doc/notes/ReleaseNotes	2020/08/15 03:28:56	1.374
+++ ray/doc/notes/ReleaseNotes	2021/02/15 23:22:50	1.384
@@ -2237,7 +2237,7 @@ Updates to evalglare and gendaylit from Jan Wienold, i
 colored sky option.
 
 =========================
-Version 5.3
+Version 5.3 (Released September 1, 2020)
 
 Created radcompare program to compare Radiance tool output to reference outputs
 during unit-testing.
@@ -2381,3 +2381,39 @@ New version of evalglare from Jan Wienold.
 
 Added -u option to gendaymtx to elide data columns (time steps) when
 the sun is not visible above the horizon.
+
+=========================
+Version 5.4
+
+Added rcollate -c option to force operation to continue even if it
+seems unnecessary.  Made tool more robust.
+
+Added -t option to rcontrib (and rfluxmtx) to report progress after the
+given number of seconds.
+
+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.
+
+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.
+
+Added "-s up" option to pabopto2bsdf to allow for 180 degree symmetry,
+meaning that data repeats after 180 degree rotation (as distinguished
+from "-s bilateral" that is mirrored about a vertical plane).  Thanks
+to Helen Rose for the suggestion and informing me that such a thing exists.