Going through this tutorial Unreal Engine 5 Beginner Tutorial - UE5 Starter Course! - YouTube
I’m doing everything according the tutorial. However, when I create material instance for texture, changing size node mode to parameter and trying to change it’s parameter value in material instance - but it doesn’t have any effect on the texture at all.
Is it a bug or I’ve missed smth? I didnt tweak any of the project settings or world settings prior to this.
Can you share screenshots of your Material setup and Material Instance?
Looks right to me! 
(Even recreated the setup within UE5 … works just fine)
If you change your Parameter nothing happens within the Preview Viewport?
Right. Chaning parameters within instance does not affect parent at all. Only changes inside the original material have an affect. It’s like some bug or smth. Like the link has been broken between changing instance and parent.
FINNNNNNAAAAAALLLLLYYYYY!!!
It was so f* simple and dumb.
Anyhow, here’s the solution for all the newbies like me.
Just drag the instance on the object…(facepalm)