Index: trunk/ppImage/src/ppImageOptions.c
===================================================================
--- trunk/ppImage/src/ppImageOptions.c	(revision 6849)
+++ trunk/ppImage/src/ppImageOptions.c	(revision 7508)
@@ -28,4 +28,6 @@
     // default flags for various activities
     options->doMask   	= false;	// Mask bad pixels
+    options->maskValue  = 0xff;         // Default mask value
+
     options->doNonLin 	= false;	// Non-linearity correction
     options->doBias   	= false;	// Bias subtraction
@@ -138,4 +140,9 @@
     // Mask recipe options
     options->doMask = psMetadataLookupBool(NULL, recipe, "MASK");
+    psMaskType maskValue = psMetadataLookupU8(&status, recipe, "MASK.VALUE");
+    if (status) {
+	options->maskValue = maskValue;
+    }
+
     options->doBias = psMetadataLookupBool(NULL, recipe, "BIAS");
     options->doDark = psMetadataLookupBool(NULL, recipe, "DARK");