Index: trunk/ppSmooth/src/ppSmoothReadout.c
===================================================================
--- trunk/ppSmooth/src/ppSmoothReadout.c	(revision 25976)
+++ trunk/ppSmooth/src/ppSmoothReadout.c	(revision 26008)
@@ -35,5 +35,8 @@
     float minGauss = 0.1;
     float nSigma = 3.0;
-    float sigma = psMetadataLookupF32 (&status, recipe, "SIGMA");
+    float sigma;
+    if (!(sigma = psMetadataLookupF32(&status,config->arguments,"SIGMA"))) {
+      sigma = psMetadataLookupF32 (&status, recipe, "SIGMA");
+    }
 
     bool oldThreads = psImageConvolveSetThreads(true); // Old value of threading in psImageConvolve