How to interpret fog settings

Most fog settings have a min and max value. These are generator settings.

Each night a new fog-configuration is calculated with a new value for each setting.

The savegame keeps track of the current and the next settings.

Configuration

Each map links an environment file. The basegame environment files can be used with $data. A custom environment file can be added to a map an linked in the map.xml file.

<map>
    <environment filename="config/environment.xml" />
</map>

Fog settings for every season

Fog settings are configured for each season. GroundFog can be limited by weathertype.

config/environment.xml

<environment>
    <weather>
        <season name="autumn">
            <fog>
                <groundFog />
                <heightFog />
            </fog>
        </season>
        <season name="spring">
            <fog>
                <groundFog>
                    <weatherTypes>
                        <weatherType name="SUN" />
                        <weatherType name="CLOUDY" />
                    </weatherTypes>
                <groundFog>
                <heightFog />
            </fog>
        </season>
    </weather>
</environment>

Height Fog

This is permanent fog. But every generation a new value is chosen for how much fog will be visible. And where the starting-height is.

The fog fills from ground level upto this generated value.

groundLevelDensity ranges from 0 (no fog) to 1 (completly filled)

Code 

<fog>
    <heightFog>
        <groundLevelDensity min="0.05" max="0.2" />
        <maxHeight min="420" max="600" />
    </heightFog>
</fog>

Ground Fog

GroundLevelDensity

Ground Fog has 3 density settings that work together. All 3 will get a new value within min/max each generation.

  • coverageEdge0
  • coverageEdge1
  • groundLevelDensity

MinValleyDepth

Valleys will get some added fog upto this heightlevel generated within min/max each night.

Extra Height

With some weather conditions an extra layer of fog is generated. This layer starts at ground level and goes up to this generated value between min/max.

groundLevelDensity is calculated in the same min/max as normal groundFog.

StartDayTimeMinutes

When the fog for that day starts.

Generated at midnight withinin min/max range

EndDayTimeMinutes

When the fog for that day ends.

Generated at midnight withinin min/max range

Code 

<fog>
    <groundFog>
        <coverageEdge0 min="0.05" max="0.4" />
        <coverageEdge1 min="0.6" max="1" />
        <extraHeight min="4" max="15" />
        <groundLevelDensity min="0.01" max="0.05" />
        <minValleyDepth min="3" max="8" />
        <startDayTimeMinutes min="180" max="280" />
        <endDayTimeMinutes min="480" max="600" />
        <weatherTypes>
            <weatherType name="SUN" />
            <weatherType name="CLOUDY" />
        </weatherTypes>
    </groundFog>
</fog>

BaseGame configurations

For the basegame maps the fog configuration doesn’t change much between seasons.

The things that do change between seasons:

  • startDayTimeMinutes -> When is the ‘morning’ for this season
  • endDayTimeMinutes -> When is the ’evening’ for this season
  • groundLevelDensity -> How much fog

Save Game

Every savegame will have an environment.xml file with the current fog settings. And the next fog settings.

When loading a savegame the fog setting from last will be applied.

savegame5/environment.xml

<environment>
    <weather>
        <fog alpha="1.000000" visibilityAlpha="1.000000" duration="3600000.000000">
            <target>
                <groundFog coverageEdge0="0.0939178" coverageEdge1="0.615696" extraHeight="21.590191" groundLevelDensity="0.519497" minValleyDepth="20.260044" startDayTimeMinutes="233" endDayTimeMinutes="539" weatherTypes="SUN CLOUDY RAIN HAIL"/>
                <heightFog maxHeight="545.661743" groundLevelDensity="0.107280"/>
            </target>
            <last>
                <groundFog coverageEdge0="0.09" coverageEdge1="0.09" extraHeight="20.0" groundLevelDensity="0.09" minValleyDepth="24.797054" startDayTimeMinutes="231" endDayTimeMinutes="527" weatherTypes="SUN CLOUDY RAIN HAIL"/>
                <heightFog maxHeight="100" groundLevelDensity="0.9137530"/>
            </last>
        </fog>
    </weather>
</environment>
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Last updated 30 Mar 2025, 00:09 +0100 . history