"I watched c-beams glitter in the dark near the Tanhauser Gate"
It's the romance of Roy Batty's soliloquy that conjures up for me a far off exoctic place in the cosmos. I imangined the gate to be of ancient origin, built eons ago by a space faring civilisation. I imagined the c-beams to be interstellar arc lights of unknown origin and were intentionally incorporated to help give the gate an ominous yet mysterious feel. We see Roy in the lower forground looking out in awe at this feat of wonder .