There are no miniature environments in the ST, nor any model ships. The primary means for set extensions are simply CGI. Yes, there are lots of location shoots, but that was true of the PT too. The only completely CG environments I can think of in the PT is the Droid Factory. And I think the ST is a rehash. I know that's just my opinion, but there's very little novelty in the ST to me, masses of re-used OT scenarios, and an identical visual aesthetic.