Index: /trunk/ippconfig/gpc1/ppMerge.config
===================================================================
--- /trunk/ippconfig/gpc1/ppMerge.config	(revision 15915)
+++ /trunk/ippconfig/gpc1/ppMerge.config	(revision 15916)
@@ -1,5 +1,10 @@
 # Mask generation --- already included in default, above
-PPMERGE_MASK	METADATA
-  MASK.BAD	F32	2.0		# Threshold for bad pixels (sigma)
-  MASK.MODE	STR	VALUE		# Threshold for bad pixels (sigma)
+PPMERGE_DARKMASK METADATA
+  MASK.BAD	 F32	2.0		# Threshold for bad pixels (sigma)
+  MASK.MODE	 STR	VALUE		# Threshold for bad pixels (sigma)
 END
+
+PPMERGE_FLATMASK METADATA
+  MASK.BAD	 F32	0.5		# Threshold for bad pixels (sigma)
+  MASK.MODE	 STR	FRACTION	# Threshold for bad pixels (sigma)
+END