The ASCII characters which represent the display of the dungeon can now optionally be replaced with a collection of bitmap tiles. (So, for example, 'S' could be replaced with a more graphical representation of a snake.) One example collection is included in the distribution. Tiles can be customized by using an icon editor (such as Pimlico Software's free "dbIcon+") and may be grayscale or color. This feature is currently restricted to OS 3.5 and higher.