--- a/LuaAPI.wiki	Sun Dec 07 17:49:56 2014 +0000
+++ b/LuaAPI.wiki	Sun Dec 07 17:56:37 2014 +0000
@@ -100,6 +100,11 @@
 </blockquote>
 Can be used to show the mission and for more setup, for example initial target spawning.
 
+=== <tt>onPreviewInit()</tt> ===
+This function is called when the map preview in the frontend is initialized. This happens when the script is selected or you change a map generator parameter.
+
+It is useful for scripts which create their own maps (see `AddPoint` and `FlushPoints`). If you create a map in this function, a preview will be generated from this map and is exposed to the frontend.
+
 === <tt>onGameTick()</tt> ===
 
 <blockquote>This function is called on every game tick, i.e. 1000 times a second.  If you just need to check on something periodically, consider...