The Easy Decal system provides you a very simplified workflow for putting decals  all over your game world. The Easy Decal system supports all kinds of shaders and materials from parallax occlusion to transparent.

Put details everywhere and upgrade your game environment to a new level. You can stick decals even to massive bumpy surfaces - the dynamic geomerty generator will automatically adjust all parameters (UVs, tangents, normals, etc.) so your decal will fit everywhere.