CAD & FBX imports - Retopo options?

1 tip for visual intent
leave edges intact (w/o beveling) and use Bevel shader

All that matters is what can be observed.
Usually, when i get heavy geo (>10 mil.) i tend to decimate, sanitize & optimize - to get just what i need to visualize. Materials applied are almost always procedural or Box/triplanar mapped.

Here i ran through VDB remesh > Smart UV Project > Set World with “FlowCheck” lighting > Animated & got this

PS.
I wish poles-pinching on environmental mapping would get some TLC :sunny: