Included are several placeable water tiles. They're somewhat tricky to use, but let you create some nice water effects cheaply (e.g. no need to create new tiles). There are three levels included - low, medium, and high, as well as two sizes (1x1 and 4x4). These allow you to create some quite nice effects such as swamps, marshlands, flooded caverns, and so on. Included is a hak pack, an erf, and a sample module to demonstrate a few concepts. Read the readme.txt for instructions and important hints on how to use.