Index: trunk/MagicSoft/Mars/mgui/MHexagon.cc
===================================================================
--- trunk/MagicSoft/Mars/mgui/MHexagon.cc	(revision 2958)
+++ trunk/MagicSoft/Mars/mgui/MHexagon.cc	(revision 3219)
@@ -169,7 +169,11 @@
     //
     //  compute the distance from the border of Pixel
-    //  here in the first implementation is just circle inside
+    //  here in the first implementation is just circle outside
     //
     return fD*0.5772 < disthex ? disthex-fD*0.5772 : -1;
+    //
+    // FIXME: this approximate method results in some photons being 
+    // assigned to two or even three different pixels.
+    //
 }