fgdata/Materials/regions/caribbean.xml

<?xml version="1.0"?>
<!-- General settings for all caribbean materials -->
<PropertyList>
  <!-- Define the caribbean as a box with given latitude/longitude -->
  <condition>
    <and>
     <greater-than>
      <property>position/longitude-deg</property>
      <value>-85.0</value>
     </greater-than>
     <less-than>
      <property>position/longitude-deg</property>
      <value>-40.0</value>
     </less-than>
     <greater-than>
      <property>position/latitude-deg</property>
      <value>11.0</value>
     </greater-than>
     <less-than>
      <property>position/latitude-deg</property>
      <value>25</value>
     </less-than>
    </and>
  </condition>
  
  <!-- Caribbean buildings definitions. Notes that these will be used for -->
  <!-- both towns and cities                                              -->
  <building-texture>Textures/buildings-caribbean.png</building-texture>
  <building-lightmap>Textures/buildings-caribbean-lightmap.png</building-lightmap>
  <building-small-min-floors>1</building-small-min-floors>
  <building-small-max-floors>2</building-small-max-floors>
  <building-small-max-width-m>20.0</building-small-max-width-m>
  <building-small-min-depth-m>8.0</building-small-min-depth-m>
  <building-small-max-depth-m>20.0</building-small-max-depth-m>
  <building-medium-min-floors>1</building-medium-min-floors>
  <building-medium-max-floors>3</building-medium-max-floors>

  <!-- Appropriate tropical trees -->
  <tree-texture>Trees/tropical-alt-summer.png</tree-texture>
  <tree-varieties>8</tree-varieties>
  <tree-range-m alias="/params/forest/tree-range-m"/>
  <tree-height-m>25.0</tree-height-m>
  <tree-width-m>15.0</tree-width-m>
  
</PropertyList>