A few people have asked for this, so i thought, what the hell i will make a tutorial for everyone.
Step 1
Load up the model that you wish to apply the wire frame to. In this case a tessellated cube.
Step 2
Press f10 to open up the render settings, scroll to the bottom and expand assign renderer. We then need to change the production renderer to mental ray.
Step 3
Next we need to add a skylight into our scene, which can be found in the lights tab on the right. We also want to go to the indirect illumination tab in our render options menu to make sure Final Gather in enabled.
Step 4
Next, we need to press "M" to open up the material editor window. We then need to change the standard material to composite.
Step 5
Next, click the "none" button next to mat1 and apply a standard material to it.
Step 6
Now we need set the diffuse colour to black, and turn on wireframe mode.
Step 7
Apply the material to the model then just press f9 to render, and enjoy!
Note
You can even apply the wireframe over a diffuse texture, which will be covered in the next tutorial.