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the unity package includes two different FX layers you can choose to merge, you will only need to merge the one that fits your avatar (mixing write defaults can make gestures act weird) (The FX layers are identical otherwise, it's just some check boxes that are ticked on or off, which you can also manually change yourself)

These studies are also not conclusive

The leaves used are cultivated under completely natural conditions by Native American Indians

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it's about ensuring the safety and comfort of all passengers and crew members onboard