@Antaran, 

One of the lighting models is "Bevel" in Shader Plus. It fakes bevels on polyline edges, preventing the requirement to model them. This allows highlights to occur on the edges to better define form and make things look more 'real' since sharp edges are rarely a reality. The image in this post reveals the hard edges that are softened by the Bevel function. 

Anything Goos is not a displacement function per se. It merely allows the combining of two different shaders at the edges of objects and then provides ways to apply noise for the blend between the two. Awhile back I did a tutorial that uses Anything Goos: Weatherize Quickly. This vehicle was textured with Anything Goos really fast with no texture painting required.