Having an issue

hello everyone I am new to U4 I do not have any experience but I am slowly but surely getting the hang of it. So I am having a difficult time trying to figure out why when I apply a material to a wall both sides of the walltake the material. SO MY QUESTION IS HOW CAN I CHANGE IT TO WHERE I CAN SET AN INTERIOR MATERIAL AND AN EXTERIOR MATERIAL ON ONE WALL?? ANY HELP WILL BE APPRECIATED…

What is your wall? If it’s a box brush you can just click the surface in the editor and pick a different material for each surface…

It sounds like you’re using a mesh wall with only one material element. If you want a different material for each side of the wall, you will need to apply two separate materials in your modeling package before exporting to UE4.