--- ray/doc/notes/ReleaseNotes	2007/11/05 23:40:25	1.139
+++ ray/doc/notes/ReleaseNotes	2007/11/17 01:13:51	1.141
@@ -1638,3 +1638,8 @@ Adding ability in mkillum to incorporate BSDF data in 
 Internal interface (raypcalls) now used in place of rtrace process(es).
 
 Fixed pixel alignment in pcomb for size reduction and enlargement.
+
+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.