I would say that "voxel" is the key word in that shader and it would be very good at drawing outlines around boxes.
This looked like it might do the trick
This is interesting. I think it pretty much gives you what you want.
I have taken a model and smoothed it at 15 degree angles and used that to break out the edges (I'm 100% sure you can easily do this with blender)
Then i extruded along normals (maybe rails in blender). I broke out the extrusion and saved that as a separete mesh.
I loaded the base model and then loaded and fixed the outline model to the base
I think it gives you much greater control over the outline (You could add glow and all kinds of effecs) and it is proportionate to the distance to camera.
Anyway. I'm pretty sure this would be easy to do in blender