[QUESTION] How to apply material to both side of walls?

Setting up a basic building and was wondering how would I go about putting a material on both sides of my walls, since I want the outside of the building to look completely different than the inside and each room will look different.

You could build inner and outer walls, out of different assets and build a hause like lego.
But better way is uv unwrap, adding multiple material slots /id to your mesh in external 3d app, reimport and then you could do that.

Appreciate it, I’ll go with the inner / outer walls then move onto learning the other.

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