How to choose specific object with postprocess materials

Development Asset Creation
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1

First of all, I am new to postprocess materials.
I want to use postprocess materials only to visual effects that I created on Niagara. To do this, I have to choose specific object(visual effect) on material, blueprint or somthing. Is that possible?

Sorry for my bad English.

2

I’ve moved this question over to the Asset Creation category. The Unreal Engine Online Learning Feedback forum is for unreal engine learning material. This category is better for this type of question.

3

Thank you so much!