However, there is one caveat, it looks like the shader generator has never processed mirror shine, so these two parameters specular and shininess have no effect.
I noticed this during the discussion of this topic: Trying to obtain Panda3ds synthesized shaders (or looks) - #33 by jnpickee
In this connection, I tried to remember if I had ever seen a mirror shine when using a standard shader generator, but I could not remember anything.