There is an Emboss tool in filter that gives a bit a depth or the displacement tool in deform, but i don't think it will gives what you want. That is not the purpose of shake. You should render your text in photoshop or a 3D soft to import in shake as pictures.
nuke would have the abitlity to import a 3D object though. Shake is getting old now and still do what it was suppose to do very well, but don't ask to much from it.
cheers