Unreal Engine　コツコツ自習_Set Vector Parameter Value

Hi, I’m getting started with UE4 blueprint scripting. I’m using the 2.5D project template and the idea is that I want to change the template character’s colour when I press a button : 1 to red 2 to green 3 to blue So, I’ve set a Dynamic Material Instance “characterMat” on my creation script. And I’ve used this in my event graph to set the Vector Parameter DiffuseColor to the appropriate value. This however is not working for me. When debugging I can see the setters being called bu...