Terrain group XML format

Terrains are currently organized into groups, with each group in its own directory inside art/terrains (see mod layout). The group is defined by a terrains.xml file in that directory, with the following format:

<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>
<!DOCTYPE Terrains SYSTEM "/art/textures/terrain/types/terrains.dtd">
<Terrains>
    <Terrain groups="grass" />
</Terrains>

Terrain texture XML format

Individual terrain textures are then defined in XML files within each group, along with associated material (see MaterialSystem). Their XML format is the following:

<?xml version="1.0" encoding="utf-8"?>
<terrain>
    <textures>
        <texture name="baseTex" file="types/grass1.png"/>
    </textures>
    <material>terrain_base.xml</material>
</terrain>