Gotcha, after I posted, I started to think that if they were developed, you may want to put them as a separate pack to purchase / download anyways 
AlienSkybox, AlienWeatherEffects, etc… 
Gotcha, after I posted, I started to think that if they were developed, you may want to put them as a separate pack to purchase / download anyways AlienSkybox, AlienWeatherEffects, etc…