Use surfaceGuis and set AlwaysOnTop to true.
Create a new surfaceGui for each part face for every part in your model with a frame that is whatever color and transparency you want, and that creates the ESP ability. If you want it to look the same behind walls as it does when not obscured by a wall set the part’s transparency to 1.
There isn’t a better way to do this that I know of, but using surfaceGuis isn’t that laggy. As long as you aren’t looping through all the players and their characters every frame it won’t have performance issues.
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