How to add solid border into cube edge in three.js

Questions
1

Hi.
Please explain to me in three.js how to add a solid border to the cube edge.
Or please send me a sample of your code.
Thank you in advance.

2

As you have provided no details about what kind of border you need

One option is to use EdgesGeometry. Here is one oversimplified example with a prism (click on the image to run it):

image

Another option is to use a texture:

image

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3

Correct! Thank you very much.

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4

More common solution for boxes: How to render geometry edges? - #7 by prisoner849

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