fgdata/Materials/regions/africa_savanna.xml

<?xml version="1.0"?>
<!-- Regional definitions for the African savanna -->
<PropertyList>
  <name>Africa: savanna</name>

  <area>
    <lat1>18.19</lat1>
    <lat2>-36.72</lat2>
    <lon1>-19.05</lon1>
    <lon2>42.29</lon2>
  </area>

  <material>
    <name>RainForest</name>
    <name>MixedForestCover</name>
    <name>MixedForest</name>
    <name>DeciduousBroadCover</name> <!-- these sholdn't be in Africa, but I've came across them there -->
    <name>DeciduousForest</name>
    <name>DeciduousNeedleCover</name>
    <effect>Effects/forest</effect>
    <texture-set>
      <texture>Terrain/savanna-grass.png</texture>
      <texture n="11">Terrain/savanna-overlay.png</texture>
      <texture n="13">Terrain/rock_brown.png</texture>
      <texture n="15">Terrain/airport_grass2.png</texture>
    </texture-set>
		<parameters>
			<grain_strength>0.5</grain_strength>			
			<hires_overlay_bias>0.1</hires_overlay_bias>
		</parameters>
    <xsize>2000</xsize>
    <ysize>2000</ysize>
    <light-coverage>900000000.0</light-coverage>
    <wood-coverage>8000.0</wood-coverage>
    <tree-texture>Trees/savanna-trees.png</tree-texture> 
    <tree-varieties>4</tree-varieties>
    <tree-range-m alias="/params/forest/tree-range-m"/>
    <tree-height-m>20.0</tree-height-m>
    <tree-width-m>25.0</tree-width-m>
    <rolling-friction>0.8</rolling-friction>
    <bumpiness>0.85</bumpiness>
  </material>

  <material>  
    <name>EvergreenBroadCover</name>
    <name>EvergreenForest</name>
    <name>MixedCropPastureCover</name>
    <name>MixedCrop</name>
		<name>Grassland</name>
    <name>GrassCover</name>
    <effect>Effects/forest</effect>
    <texture-set>
      <texture>Terrain/savanna-grass2.png</texture>      
      <texture n="11">Terrain/savanna-grass.png</texture>
      <texture n="13">Terrain/rock_brown.png</texture>
      <texture n="15">Terrain/airport_grass2.png</texture>
    </texture-set>
		<parameters>
			<grain_strength>0.5</grain_strength>			
			<hires_overlay_bias>-0.1</hires_overlay_bias>
		</parameters>
    <xsize>2000</xsize>
    <ysize>2000</ysize>
    <light-coverage>900000000.0</light-coverage>
    <wood-coverage>80000.0</wood-coverage>
    <tree-texture>Trees/savanna-trees.png</tree-texture> 
    <tree-varieties>4</tree-varieties>
    <tree-range-m alias="/params/forest/tree-range-m"/>
    <tree-height-m>20.0</tree-height-m>
    <tree-width-m>25.0</tree-width-m>
    <rolling-friction>0.4</rolling-friction>
    <bumpiness>0.65</bumpiness>
  </material>

  <material>  
    <name>ShrubCover</name>
    <name>ShrubGrassCover</name>
    <name>ScrubCover</name>
    <name>Scrub</name>
    <name>Marsh</name>
    <name>FloodLand</name>
    <name>SaltMarsh</name>
    <name>HerbWetlandCover</name>
    <name>WoodedWetlandCover</name>
    <effect>Effects/forest</effect>
    <texture-set>
      <texture>Terrain/savanna-grass.png</texture>
      <texture n="11">Terrain/savanna-overlay.png</texture>
      <texture n="13">Terrain/rock_brown.png</texture>
      <texture n="15">Terrain/airport_grass2.png</texture>
    </texture-set>
		<parameters>
			<grain_strength>0.5</grain_strength>			
			<hires_overlay_bias>-0.18</hires_overlay_bias>
		</parameters>
    <xsize>4000</xsize>
    <ysize>4000</ysize>
    <light-coverage>900000000.0</light-coverage>
    <wood-coverage>85000.0</wood-coverage>
    <tree-texture>Trees/savanna-trees.png</tree-texture>
    <tree-varieties>4</tree-varieties>
    <tree-range-m alias="/params/forest/tree-range-m"/>
    <tree-height-m>20.0</tree-height-m>
    <tree-width-m>25.0</tree-width-m>
    <rolling-friction>0.4</rolling-friction>
    <bumpiness>0.65</bumpiness>
  </material>

	<material>  
    <name>DryCropPastureCover</name>
    <name>DryCrop</name>
    <effect>Effects/forest</effect>
    <texture-set>
      <texture>Terrain/savanna-grass.png</texture>
      <texture n="11">Terrain/savanna-overlay.png</texture>
      <texture n="13">Terrain/rock_brown.png</texture>
      <texture n="15">Terrain/airport_grass2.png</texture>
    </texture-set>
		<parameters>
			<grain_strength>0.5</grain_strength>			
			<hires_overlay_bias>-0.18</hires_overlay_bias>
		</parameters>
    <xsize>2000</xsize>
    <ysize>2000</ysize>
    <light-coverage>900000000.0</light-coverage>
    <wood-coverage>90000.0</wood-coverage>
    <tree-texture>Trees/savanna-trees.png</tree-texture>
    <tree-varieties>4</tree-varieties>
    <tree-range-m alias="/params/forest/tree-range-m"/>
    <tree-height-m>20.0</tree-height-m>
    <tree-width-m>25.0</tree-width-m>
    <rolling-friction>0.4</rolling-friction>
    <bumpiness>0.65</bumpiness>
  </material>
  
  <material>
    <name>BuiltUpCover</name>
    <name>Urban</name>
    <effect>Effects/urban</effect>
    <texture-set>
      <texture>Terrain/city1-middle-east.png</texture>
      <texture n="2">Terrain/city1-relief-light.png</texture>
    </texture-set>
    <texture-set>
      <texture>Terrain/city2-middle-east.png</texture>
      <texture n="2">Terrain/city2-relief-light.png</texture>
    </texture-set>
    <object-mask>Terrain/city1.mask.png</object-mask>
    <object-mask>Terrain/city2.mask.png</object-mask>
    <xsize>1000</xsize>
    <ysize>1000</ysize>
    <light-coverage>100000.0</light-coverage>
    <emissive>
      <r>0.05</r>
      <g>0.05</g>
      <b>0.02</b>
      <a>1.0</a>
    </emissive>
    <object-group include="Materials/base/urban-buildings.xml"/>
    <building-coverage>2500.0</building-coverage>
    <building-small-ratio>0.4</building-small-ratio>
    <building-small-min-floors>3</building-small-min-floors>
    <building-small-max-width-m>30.0</building-small-max-width-m>
    <building-small-min-depth-m>10.0</building-small-min-depth-m>
    <building-small-max-depth-m>30.0</building-small-max-depth-m>
    <building-medium-ratio>0.6</building-medium-ratio>
    <building-large-ratio>0.2</building-large-ratio>
    <wood-coverage>250000.0</wood-coverage>
    <tree-texture>Trees/mixed-shrub.png</tree-texture>
    <tree-varieties>8</tree-varieties>
    <tree-range-m alias="/params/forest/tree-range-m"/>
    <tree-height-m>15.0</tree-height-m>
    <tree-width-m>10.0</tree-width-m>
  </material>

  <material>
    <texture-set>
      <texture>Terrain/city1-middle-east.png</texture>
      <texture n="2">Terrain/city1-relief-light.png</texture>
    </texture-set>
    <texture-set>
      <texture>Terrain/city2-middle-east.png</texture>
      <texture n="2">Terrain/city2-relief-light.png</texture>
    </texture-set>
    <object-mask>Terrain/city1.mask.png</object-mask>
    <object-mask>Terrain/city2.mask.png</object-mask>
    <xsize>1000</xsize>
    <ysize>1000</ysize>
    <light-coverage>100000.0</light-coverage>
    <emissive>
      <r>0.05</r>
      <g>0.05</g>
      <b>0.02</b>
      <a>1.0</a>
    </emissive>
    <object-group include="Materials/base/industrial-buildings.xml"/>
  </material>

</PropertyList>