How to get and change material parameters in an blueprint

[Danieldealmeida]

How do I get a blueprint to get the parameters of a material? I would like to change values ​​within a blueprint on the fly.

[ClockworkOcean]

WTF Is? A Dynamic Material Instance in Unreal Engine 4

[yetliuxian1 (yetliuxian)]

材质参数集+lerp透明度