How to apply a different material to the interior section of a destructible mesh

how to apply a different material to the interior section of a destructible mesh
I do not seem to understand what the material elements do - I created a 2nd one and applied a different material to it - but it didn’t do anything

when you create the destructible mesh, after fracturing, it will create a second material element for you. all you need to do is go into the settings on the right and change the material. to find the materials open the destructable mesh then go to the destructible settings tab on the right, then look for the skeletal mesh section and then materials. element 1 should be the one that your looking to change.

that worked great - thank you for some reason it didnt work the first time