Advanced Technologies In Two Timelines

The centrum: dome, towers, silver spiderwebs, mobile units, darting and hovering flyers, shimmering air, force fields, quantum waves, microscopic and submicroscopic entities. (Kalava knows "'...old tales of monstrous things glimpsed from afar.'" (Genesis, p. 115))
-copied from here.

Foreunner tech on an outer planet of a giant star in
For Love And Glory, IL:

an upward helicoid;
a spidery polygonal dome;
less familiar shapes;
smaller moving shapes;
a shimmer like a mirage or heat-wave.

They sound similar.