--- a/PresetMaps.wiki	Sat Oct 08 03:59:28 2011 +0000
+++ b/PresetMaps.wiki	Mon Oct 10 20:04:11 2011 +0000
@@ -61,7 +61,7 @@
   * Pixels with _alpha value_ = 0 will not be subject to collision
   * White pixels will be terrain
   * Red pixels will be indestructible terrain (regardless of game mode settings)
-  * Black pixels will be terrain with background texture applied 
+  * Black pixels will be terrain with background texture applied (Note: Adding any black pixels removes erasure protection from areas where the map.png is solid but the mask.png is transparent)
   * Blue pixels will be ice
 
 *Examples:*