This cosplayer recently cosplayed as Luke Skywalker which we do not see a lot these days, his approach was. The unnamed cosplayer decided to turn his Luke into a Force Ghost and it’s just spot on. He takes what seems to be blue tulle and drapes it over and it gives the complete transparent blue glow for the special effect.
The post was shared on Reddit by _NITRISS_ but that post seems to have been removed by moderators. Sadly, it’s not clear where this was taken or who the cosplayer was, so if you know pleas let us know in the comments.