This tutorial goes over two techniques that are used in combination to get rid of perfectly straight edges in Unreal Engine and add more realism to your environments - face weighted normal and edge mesh decal techniques. Using Mixer as a base to create our normal texture as opposed to the traditional technique of sculpting and baking our normal map we can create some fast variations to use in our decal material in Unreal. In addition I will introduce you to a UV technique exclusive to 3ds max. (If you are using another software package you can do this manually!)
In order to complete the tutorial you will need the following free plugin: http://www.bytehazard.com/articles/wn