I was trying to replicate this demo which was done in unity.
the only idea that came to me was that this was done on a plane with some kind of ray casting, but i felt like there was more to it lol
here’s what i have
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This is great !!!
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Thanks !! 
Looks like this initial distance is set to something specific then it just keep drawing on a plane that normal is an invert of the cameras forward.
Then if one of the raycasts hits a object it sets the depth of the plane to that distance for a time threshold/ end of input of some kind it seems.
You are really really close to what they did, They are also using ribbons instead of a line system but otherwise great work as ususal!
<3 keep up the good work.
Ohh also I am still sitting on your resume, waiting for the right time to bring you up.
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Yeah the mechanism is tricky! Thanks for pointing that out!
Hahah appreciate it!
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we love himAwww thanks!! : )