--- ray/doc/notes/ReleaseNotes	2024/04/26 23:10:59	1.449
+++ ray/doc/notes/ReleaseNotes	2024/05/20 23:21:28	1.451
@@ -2693,3 +2693,7 @@ scenes with sharp cut-offs.
 
 Added -i option to gendaymtx to match -i option of gendaylit.
 Thanks to Yongqing for initial implementation.
+
+Changed rcrop so negative #rows or #cols counts back from end.
+
+Added rcomb -n option for multi-processing of very large matrices.