Just put this on the top of everything else. All mtl_copy does is call a function which gives the models the same material settings as mat_model. Here:

Code:

---

 material* mtl1;

function mtl_copy(mtl_source)
{
  mtl1 = mtl_source;
  vec_set(mtl.ambient_blue,mtl1.ambient_blue);
  vec_set(mtl.specular_blue,mtl1.specular_blue);
  vec_set(mtl.diffuse_blue,mtl1.diffuse_blue);
  vec_set(mtl.emissive_blue,mtl1.emissive_blue);
  mtl.power = mtl1.power;
} 

---