Cheers
This helped me alot, had some problems with Dynamic Materials in blueprints. I managed to watch some tutorials on how to get a color to change using a vector parameter, but when replacing it with a scaler parameter it just did not work? Anyway, I set it up as shown here and and after a few silly mistakes got it working.
Just so you know I used it to assign a two digit ID to a door. Basically I had a texture going A down to J and some numbers next to it. I split the staticmesh into two different materials for those two digits and created a dynamic material with variables. I then created a blueprint and using this method managed to make it so I could change each of the door ID’s separately with variables assigned to each. Hence a good way to create a long corridor with each door having a unique door number. YAY
Cheers again.