--- ray/doc/notes/ReleaseNotes	2007/11/15 18:33:50	1.140
+++ ray/doc/notes/ReleaseNotes	2007/11/17 01:13:51	1.141
@@ -1641,3 +1641,5 @@ Fixed pixel alignment in pcomb for size reduction and 
 
 Allow rtcontrib user to set -P and -PP options for persistent rendering.
 The only caveat is that -n setting > 1 requires -PP rather than -P.
+
+Added -c option to rtcontrib to facilitate cumulative calculations.