NB: I’ve posted this in another topic a few days ago:
Tree density is preset in files (most likely). For example:
\OneStore\fs-base\vegetation\10-asobo_biomes.xml
<BiomeRule name="Cactus" speciesInstancesPerHectar="200" artificialSurfacesScaleFactor="0.6">
<SpeciesList>
<Species name="scrub" spawnRatio="1">
<Color r=".7" g=".8" b=".7"/>
</Species>
<Species name="cactus" spawnRatio="1">
<Color r=".7" g=".8" b=".7"/>
</Species>
</SpeciesList>
<EcoRegionList>
<EcoRegion name="Baja California desert"/>
<EcoRegion name="Chihuahuan desert"/>
<EcoRegion name="Gulf of California xeric scrub"/>
<EcoRegion name="Tamaulipan matorral"/>
</EcoRegionList>
</BiomeRule>
<BiomeRule name="Conifer_Cold" speciesInstancesPerHectar="700" artificialSurfacesScaleFactor="0.6">
-
speciesInstancesPerHectar=“200”
.
this is self explicit -
Species name=“scrub” spawnRatio=“1”
.
this is, mostly likely, the percentage of this type over the region (here 100%)
\OneStore\fs-base\vegetation\10-asobo_biomes_cities.xml
<BiomeRule name="Deciduous_Cities" speciesInstancesPerHectar="700" onlyArtificialAreas="yes">
<!-- Low deciduous trees in artificial areas -->
<SpeciesList>
<Species name="deciduous_small"/>
<Species name="scrub" spawnRatio="0.75"/>
<Species name="scrub_big" spawnRatio="0.15"/>
<Species name="shrub" spawnRatio=".25"/>
</SpeciesList>
\OneStore\fs-base\vegetation\10-asobo_species.xml
<Species name="conifercool">
<Variations>
<Variation spawnRatio="1">
</Species>