MVL files are specific to Model Editor. They are only used to view models under different lighting conditions. You can create, load, save, and configure them as required, but they are only used in Model Editor. World Editor uses XML files to describe lights.

Mentioned in document Content Tools Reference Guide's section Model Editor → Panel summary → Materials Settings panel.

The grammar for the MVL light configuration files is described below:

<root>
  <Lights>
    +<Light>
       ?<Type>     [Ambient|Directional|Omni|Spot|Empty] </Type>
       ?<Color>    float float float                     </Color>
       ?<Enabled>  [true|false]                          </Enabled>

        <! If Type != Ambient >
        <Location> float float float                     </Location>

       <! If Type = Directional or Type = Spot >
       ?<Orientation> float float float </Orientation>
       
        <! If Type = Omni or Type = Empty >
       ?<Full_Radius>    float  </Full_Radius>
       ?<Falloff_Radius> float  </Falloff_Radius>

        <! If Type = Spot >
       ?<Cone_Size> float </ConeSize>

     </Light>
  </Lights>
</root>

Grammar of MVL light configuration file

The list below describes the tags in the MVL light configuration file: