Index: trunk/psModules/src/objects/pmSource.c
===================================================================
--- trunk/psModules/src/objects/pmSource.c	(revision 34403)
+++ trunk/psModules/src/objects/pmSource.c	(revision 35768)
@@ -1145,5 +1145,4 @@
     bool status;
     psEllipseShape oldshape;
-    psEllipseShape newshape;
     psEllipseAxes axes;
 
@@ -1166,13 +1165,13 @@
     if (!isfinite(oldI0)) return false;
 
+    bool useReff = pmModelUseReff (model->type);
+    pmModelParamsToAxes (&axes, PAR[PM_PAR_SXX], PAR[PM_PAR_SXY], PAR[PM_PAR_SYY], useReff);
+
     // increase size and height of source
-    axes = psEllipseShapeToAxes (oldshape, 20.0);
     axes.major *= SIZE;
     axes.minor *= SIZE;
-    newshape = psEllipseAxesToShape (axes);
+
+    pmModelAxesToParams (&PAR[PM_PAR_SXX], &PAR[PM_PAR_SXY], &PAR[PM_PAR_SYY], axes, useReff);
     PAR[PM_PAR_I0]  = FACTOR*oldI0;
-    PAR[PM_PAR_SXX] = newshape.sx;
-    PAR[PM_PAR_SYY] = newshape.sy;
-    PAR[PM_PAR_SXY] = newshape.sxy;
 
     psImage *target = source->variance;