Index: /trunk/ippconfig/recipes/ppMerge.config
===================================================================
--- /trunk/ippconfig/recipes/ppMerge.config	(revision 15914)
+++ /trunk/ippconfig/recipes/ppMerge.config	(revision 15915)
@@ -20,4 +20,5 @@
 MASK.BAD	F32	4.0		# Threshold for bad pixels (sigma)
 MASK.MODE	STR	POISSON		# Threshold for bad pixels (sigma)
+STATS.BY.CHIP   BOOL	TRUE		# measure stats for masking by chip (or by readout)
 MASKVAL		STR	SAT,BAD		# Mask value for input data
 COMBINE		STR	CLIPPED		# Statistic to use for combination
@@ -67,7 +68,13 @@
 
 # Mask generation --- already included in default, above
-PPMERGE_MASK	METADATA
-  MASK.BAD	F32	3.0		# Threshold for bad pixels (sigma)
-  MASK.MODE	STR	VALUE		# Threshold for bad pixels (sigma)
+PPMERGE_DARKMASK METADATA
+  MASK.BAD	 F32	3.0		# Threshold for bad pixels (sigma)
+  MASK.MODE	 STR	VALUE		# Threshold for bad pixels (sigma)
+END
+
+# Mask generation --- already included in default, above
+PPMERGE_FLATMASK METADATA
+  MASK.BAD	 F32	3.0		# Threshold for bad pixels (sigma)
+  MASK.MODE	 STR	VALUE		# Threshold for bad pixels (sigma)
 END