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How to achieve Gaussian Blur on Material Editor?

Does anyone know how to add a real time gaussian blur effect to a texture using material nodes? It sounds like such a basic effect but I’m having trouble to find a good way to achieve it.

All I found so far was this, for box blur: https://answers.unrealengine.com/questions/207478/is-this-the-right-way-to-make-a-box-blur-material.html

Thanks!

Did you ever figure it out ?