Halo: how to appear behind only. Is there no way?????

I have an animated charecter that needs a colored halo around his border, but not covering what’s facing the camera. How can I apply it border only?

Turn on Unified Renderer.

I can’t get that to work yet, but I hope its that simple.
What other controls do I need?
http://www3.telus.net/public/pamric/HaloHelp.png

Is there no way???

how about rendering the character and the halo in separate passes. Then you can composite them together afterwards. Probably the simplest solution.

Could you up load a blend or explain a bit more. I’m unsure whether the halo object is behind the character or if the character has a halo material, whether they are 2 objects or 1.

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There were 2 meshes, the body and the halo emitter. The ‘project director’ is using 3DS which can do perimiter halo. I was about to animate raw.avi in 2 passes (like zdk1 suggested) but it turns out the halo can be large enough that I can get away with a non animated emitter behind the character.
( the odd coloring is for a game engine to lock on to for versatile recoloring…)
http://www3.telus.net/public/pamric/NewThief3.png

Can I slightly hijack this thread to ask this dumb question…

Do halos work in YafRay? If so, is there some trick to getting them to work?

Might be worth a new thread. As for me, for what I do the internal with osa is good enough.