Bonsoir,
Tu peux via un fichier XML attacher un effet à un objet et via BGLcomp le compiler pour en faire un BGL.
Voici deux exemples de code:

<?xml version="1.0" encoding="ISO-8859-1"?>
<FSData version="9.0" xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:noNamespaceSchemaLocation="bglcomp.xsd">

    <SceneryObject lat="N48° 8.4463" lon="E1° 58.3117" alt="0" pitch="0" bank="0" heading="0" altitudeIsAgl="TRUE" imageComplexity="NORMAL">
        <LibraryObject name="31ADAFF54307C07CFDCC568F237538B4" scale="1.0" />
    </SceneryObject>

    <ModelData name="31ADAFF54307C07CFDCC568F237538B4" sourceFile="Lighthouse.mdl" />
</FSData>

<?xml version="1.0" encoding="ISO-8859-1"?>
<FSData version="9.0" xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:noNamespaceSchemaLocation="bglcomp.xsd">
    <SceneryObject lat="N48° 8.4463" lon="E1° 58.3117" alt="44" pitch="0" bank="0" heading="0" altitudeIsAgl="TRUE" imageComplexity="NORMAL">
        <Effect effectName="fx_aneiffel02t.fx" effectParams="NIGHT=1" />
    </SceneryObject>
</FSData>

<?xml version="1.0" encoding="ISO-8859-1"?>
<FSData version="9.0" xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:noNamespaceSchemaLocation="bglcomp.xsd">
    <SceneryObject lat="N48° 8.4463" lon="E1° 58.3117" alt="44" pitch="0" bank="0" heading="0" altitudeIsAgl="TRUE" imageComplexity="NORMAL">
    <Effect effectName="fx_Lighthouse_light_day_beacon" />
    </SceneryObject>
</FSData>