--- ray/doc/notes/ReleaseNotes	2022/11/12 20:51:47	1.423
+++ ray/doc/notes/ReleaseNotes	2023/03/16 00:25:24	1.425
@@ -2585,3 +2585,15 @@ rendering code.  There are no current plans to add thi
 
 Added falsecolor -odim, -orct, and -c0 options to overlay grid of
 values on image.  This was requested by Rob Shakespeare.
+
+Added -i* and -o* options in rhcopy for reading rays from the
+standard input and writing rays from holodeck to standard output.
+This will hopefully be useful in combining rholo with rcontrib.
+
+Added further checking for coincident (overlapping) flat surfaces,
+preferring front sides to back sides in the ray intersection
+calculation.  This only applies to rings and faces, as the other
+surface types would have required additional calculations to
+make them work.  Material transparency is still the primary
+consideration, now followed by ray hit side, followed by
+modifier definition order in the input.