How do you set the "Lightmap Parameters" dropdown in "Lightmapping Settings" via script

Questions & Answers
1

In Unity 2018, how do you set the “Lightmap Parameters” dropdown in “Lightmapping Settings” via C# Script. It is not listed in the LightmapEditorSettings.

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123308-lightmap-params.jpg539×502 38.4 KB

2

This feels a bit gross, but I just hacked it in using reflection.

Thanks to this thread and this repo.

private LightmapParameters m_defaultLightmapParameters;

private static SerializedObject GetLightmapSettings()
{
    var getLightmapSettingsMethod = typeof(LightmapEditorSettings).GetMethod("GetLightmapSettings", BindingFlags.Static | BindingFlags.NonPublic);
    var lightmapSettings = getLightmapSettingsMethod.Invoke(null, null) as UnityEngine.Object;
    return new SerializedObject( lightmapSettings );
}

private void GetValue()
{
    SerializedObject baseSettings = GetLightmapSettings();
    SerializedProperty lightmapParameters = baseSettings.FindProperty( "m_LightmapEditorSettings.m_LightmapParameters" );

    m_defaultLightmapParameters = lightmapParameters.objectReferenceValue as LightmapParameters;
}

private void SetValue()
{
    SerializedObject baseSettings = GetLightmapSettings();
    SerializedProperty lightmapParameters = baseSettings.FindProperty( "m_LightmapEditorSettings.m_LightmapParameters" );

    lightmapParameters.objectReferenceValue = m_defaultLightmapParameters;

    baseSettings.ApplyModifiedProperties();
}