How do you make a "hologram" player model or structure model? I've completely forgotten how to do it and Google is being useless

From memory it'd be a monster_furniture with the "holographic" effect. Tweak the effect strength, rendermode and renderamnt until it looks right.

This is how I did it in a map I did a long time ago. I think.

--Scythe--

I used a cycler with the holographic effect...lol...