Index: trunk/ppSub/src/ppSubArguments.c
===================================================================
--- trunk/ppSub/src/ppSubArguments.c	(revision 19060)
+++ trunk/ppSub/src/ppSubArguments.c	(revision 19165)
@@ -200,5 +200,6 @@
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-rej", 0, "Rejection thresold (sigma)", NAN);
     psMetadataAddU8(arguments,  PS_LIST_TAIL, "-mask-bad", 0, "Mask value for bad pixels", 0);
-    psMetadataAddU8(arguments,  PS_LIST_TAIL, "-mask-blank", 0, "Mask value for blank region", 0);
+    psMetadataAddU8(arguments,  PS_LIST_TAIL, "-mask-poor", 0, "Mask value for poor pixels", 0);
+    psMetadataAddF32(arguments,  PS_LIST_TAIL, "-poor-frac", 0, "Fraction of weight for poor pixels", NAN);
     psMetadataAddF32(arguments, PS_LIST_TAIL, "-badfrac", 0, "Maximum fraction of bad pixels to accept", 1.0);
     psMetadataAddBool(arguments,  PS_LIST_TAIL, "-reverse", 0, "Reverse sense of subtraction?", false);
@@ -286,7 +287,9 @@
     VALUE_ARG_RECIPE_FLOAT("-badfrac",    "BADFRAC",         F32);
     VALUE_ARG_RECIPE_FLOAT("-penalty",    "PENALTY",         F32);
-
-    valueArgRecipeStr(arguments, recipe, "-mask-bad",   "MASK.BAD",   recipe);
-    valueArgRecipeStr(arguments, recipe, "-mask-blank", "MASK.BLANK", recipe);
+    VALUE_ARG_RECIPE_FLOAT("-poor-frac",  "POOR.FRACTION",   F32);
+
+    valueArgRecipeStr(arguments, recipe, "-mask-in",   "MASK.IN",  recipe);
+    valueArgRecipeStr(arguments, recipe, "-mask-bad",  "MASK.BAD",  recipe);
+    valueArgRecipeStr(arguments, recipe, "-mask-poor", "MASK.POOR", recipe);
 
     vectorArgRecipe(arguments, "-isis-widths", recipe, "ISIS.WIDTHS", recipe, PS_TYPE_F32);