How to Fade In decal on trigger?

Thanks for the fast reply, Violaine. =)

I got your idea and it seems to work like a charm. I’m just having a problem at the blueprint part. If you could help me would be great.

The Opacity for the texture is working just like I want.

Since i’m a newbie at blueprints, I don’t know where goes what. I managed to create a timeline with 2 seconds delay from 0 to 1 (for the Opacity parameter), but I can’t update the value. I can’t even change the Parameter Name.