Hmm… never tried such a thing before but maybe you could try this: Perform a line trace from your character to straight down the ground and get the impact location by breaking the hit results. Then subtract it from the location of the input portal. After that, manipulate the spawn location of your laser that’s gonna come out of the output portal by setting it to be the addition of the output portal’s location and the vector type result that we got from the previous step, or just set it’s relative location to be that vector type result after you spawn it as it is. Then make sure to keep this communication running by triggering whatever function you handle this continuously, maybe by using a while node which’s condition is binded to the player being inside the bounds of the input portal. Hope this helps! 
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