Index: trunk/ppSim/src/ppSimLoop.c
===================================================================
--- trunk/ppSim/src/ppSimLoop.c	(revision 12973)
+++ trunk/ppSim/src/ppSimLoop.c	(revision 12990)
@@ -575,5 +575,5 @@
 
                         // Shutter: adjust exposure time
-                        float realExpTime = expTime + shutterTime * (yFPA + 1.0) * (xFPA + 1.0) / 4.0;
+                        float realExpTime = expTime + shutterTime * (xFPA + yFPA + 2.0) / 4.0;
 
                         // Gaussian flat-field over the FPA