How to make parts have outlines

While making maps for my game, I noticed that it’s really hard to see the parts

For example:

and I wanted to see if there’s a way to make parts have a small outline and i don’t mean the selection box because it only affects one part instead of all the parts

insert a selection box into a part. And set the adornee of the selection box to the part.Feel free to use this file for your game. If you have any questions then feel free to ask. If you want it to go into all parts. Just make multiple selection boxes and set the adornee to the part.
Selection.rbxl (32.2 KB)

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