Hi !
I just found a solution to switch my materials when I press on a key on my keyboard in the product viewer.
Now, when I want to move my different obects in the player, they don’t move and if I use a command during I’m in the player.
When I quit the player, I have an error in the ProductViewer Blueprint with some actors : the problem is that I don’t know which actors they are. Even if I’m in simulation mode an looking at my blueprints.
When I delete the “switch material” blueprint I made, all of my functions are working !
That’s why I’m sure that the blueprint I made is the actual problem, but where’s the error ?
You can find attached pictures of my blueprints, I hope someone can help me 
Have a nice day !
