This is my attempt at recreating the unstable effect seen on Kylo Ren's lightsaber in episode VII.
This will give red lightsabers in the game a blade that shimmers and wavers like Kylo's in the movie, complete with lightning that crackles along the length of the blade.
Don't use in singleplayer if you don't want every dark jedi you meet to have somehow found a cracked kyber crystal for themselves.
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