[Birdbird_0]

There can't be a "true" transperent head if the person cannot see lights, simply because the graphics card cannot draw the image with the transperency fast enough.

So the way to get a true ghost effect is to set the alpha on the imgage to .6 or .3 to give it a ghostly effect,

or you could lighten the img and make it have a chekered pattern and be transperent, but it wouldn't have the same effect.