That is very interesting)
I followed the tutorial beat for beat and nothing is happening for me at the 30 minute mark. This is the point where you get the puzzle ball to move to mouse movement. All that is happening is that my ball is going through the map and the event tick connection is glowing red. It could be the version of UE4 I’m using is newer but what am I doing wrong (rather, how do I get the ball to move with my mouse cursor?
Please and thank you
Looks great… Can’t wait. 
Did you lock the Position constraints on the Puzzle Ball?
Puzzle Ball > Physics > Constraints > Lock Position
https://forums.unrealengine.com/core/image/png;base64
Im stuck at 55 min when trying out the button functionality.
I’ve narrowed it down to the “Cast to Parent” always fails…could someone help me getting on?
Has anyone figured out how to get this to work?
I am in UE4.26
The parent/child part is not working for me.
Around 54:30 minutes in, he uses a Parent class to affect the children. Casting to the parent didn’t get a state change for me. It’s not the STATE parameter in the material.
Coming out of the Line Trace By Channel, I put the cast to BallPuzzleButton_Parent and if the cast passes I put a string GOOD, and if it fails it Prints BAD. I only see BAD BAD BAD BAD every time I click.
So the cast is failing.
Any help would be nice. Thanks.