diff --git a/tools/makesim.sh b/tools/makesim.sh
new file mode 100644
index 0000000..57d3956
--- /dev/null
+++ b/tools/makesim.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+FILES=""
+
+# Example settings
+DENSITY1=4
+DENSITY2=8
+ROTATE=45
+INMIN=0
+INMAX=80
+WIDTH=1024
+HEIGHT=1024
+PIXELSIZE=0.15
+
+if [ "X$1" != "X" ]
+then
+  FILES="-u $DENSITY1 $1"
+fi
+
+if [ "X$2" != "X" ]
+then
+  FILES="$FILES -u $DENSITY2 $2"
+fi
+
+xraysim1 -soft -S $INMIN $INMAX 65535 -w $WIDTH -h $HEIGHT -p $PIXELSIZE -R 0 0 $ROTATE $FILES
+