I would like to render this kind of effect:

I would like to render it on a house. The view should be at the top, and the edges of each wall should be a glowing line. I tried the technique from this question but the result is not good with my house. Is a way to create this effect?
With a low layer weight, we barely see the house (only the walls inside):

I am looking for the wireframe effect as on the right, in Edit mode:

The blend is here : http://www.pasteall.org/blend/36004


