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Guys,anyone knows how to implement this effect?

f3c307a7ebc65191f298e7d9f7f158b786a34c8c.jpeg
b1f627d9330ae7ecfe7637c0d79afd77ecea7536.jpeg

You probably want to use Custom Depth.

Someone posted a tutorial:
https://forums.unrealengine.com/showthread.php?8601-TUTORIAL-Creating-outline-stroke-effect-around-objects

I can’t understand how is this executing , any help with this is appreciated.