Index: trunk/psModules/src/objects/pmGrowthCurveGenerate.c
===================================================================
--- trunk/psModules/src/objects/pmGrowthCurveGenerate.c	(revision 23989)
+++ trunk/psModules/src/objects/pmGrowthCurveGenerate.c	(revision 25754)
@@ -65,4 +65,5 @@
 
 	    // use the center of the center pixel of the image
+	    // 0.5 PIX: is this offset needed? probably -- the psf model uses 0.5,0.5 as the center, double check
 	    float xc = (int)(ix*readout->image->numCols + 0.5*readout->image->numCols) + readout->image->col0 + 0.5;
 	    float yc = (int)(iy*readout->image->numRows + 0.5*readout->image->numRows) + readout->image->row0 + 0.5;
@@ -195,5 +196,5 @@
 	    return NULL;
         }
-        psImageKeepCircle (mask, xc, yc, radius, "AND", PS_NOT_IMAGE_MASK(markVal));
+	psImageMaskPixels (mask, "AND", PS_NOT_IMAGE_MASK(markVal)); // clear the circular mask
 
         // the 'ignore' mode is for testing