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How do I add glowing lines on a cube or anything that have vertices on Blender 2.8? I'm a beginner so I thought adding material should work. There is another thread where it explains that but I cannot make only the vertices glow. Also it would be great if I could make the lines a bit thicker. I'm trying to make a on/off button which has glowing lines around.

Thanks!

enter image description here

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You can use Pointiness from the Input Geometry Node But as you can see here from these wire-frames the geometry plays a big part.

wire frames of different density Cubes

Using a Mix Shader with a BSDF Shader and an Emission Shader and controlling the effect with a Color Ramp glowing edges from pointiness

Of course, you could remove all the extra geometry that does not affect the effect.

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For better/other results then pointiness node you can do it with bevel node minus normals setup:

enter image description here

Material Setup:
enter image description here

Compositor Setup:
enter image description here

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