I love how this technical choices regarding the assets make complete sense and could be applied to many bloated productions - essenctially reducing ressources by about 10x, simply by adopting 2005-ish standards and a visual style just ever so slightly different from the usual, while at the same time recalling some…
Could be in the same UV tile, just as a different material yeah. If you want the "holographic" effect, then yes a floating piece of geo with emissive on it will do the trick