Index: trunk/ippconfig/recipes/reductionClasses.mdc
===================================================================
--- trunk/ippconfig/recipes/reductionClasses.mdc	(revision 37836)
+++ trunk/ippconfig/recipes/reductionClasses.mdc	(revision 37896)
@@ -569,4 +569,12 @@
 	JPEG_BIN1	STR	PPIMAGE_J1
 	JPEG_BIN2	STR	PPIMAGE_J2
+END
+
+# specific for PV3 WSdiff processing to do inverse phot
+WARPSTACK_PV3       METADATA
+        DIFF_PPSUB      STR     WARPSTACK_PV3
+        DIFF_PSPHOT     STR     DIFF
+        JPEG_BIN1       STR     PPIMAGE_J1
+        JPEG_BIN2       STR     PPIMAGE_J2
 END