For an image I'm working on I'd like to be able to make hair semi-transparent to go with a semi-transparent character.

The effect I'm looking for would be akin to the effect of a 3D hologram where you can see partially things behind the figure.

At present I haven't come across any way to do this, even with Poser 6's material room.

Is it possible? And if so how?

Attack the hair transmap and make it more black than white. You know how transmaps work? The more black, the more transparent they are. The downside to this approach is, you will see more of the model's head through the hair. Alternate idea is to make the render in layers and make the hair layer (bad rhyme) more transparent.

Can I do this inside Poser, or do I have to do it in a photo editing program? I'm not really concerned with seeing more of the head, as it will be semi-transparent as well, so they should even out. I'd render in layers, but wouldn't that mean that the hair normally hidden by the head and body would be more visible than it should through a semi-transparent figure?

No, you can't really adjust the hair transmap in Poser. Well, Im sure some Shader Guru could tell you how but it's easier to play around with it in Photoshop. The more transparent the hair, the more of the head you'll see as a direct proportion of transparency compared to the model, irrespective of how transparent the model may be. If you render in layers, the figure and all its accessories (clothes, hair, etc) will remain proportionally transparent. That is to say, you won't suddenly be able to see the hair at the back of the head, if you get my drift.

Use a math node and multiply the trans image with the trans value that you want.

I'm currently rendering, but should changing the texture strenght of the transmap do the trick?