QuoteYeah I noticed that when I tried to make a level some months ago... good thing the majority of farcry is outdoors. It also explains why my performance indoors in farcry was noticable worst. At least on my machine and I have a pretty kick ass rig.As far as I know Farcry uses OSP (oct-space-tree, very goo for outdoors/open indoors) or a form of + awesome lod + fog/distance cull + and I think more options for indoors (manual zoning). That's why it can easily go from outdoor to indoor and still cram lots of detail, no?
The detailed vegetation is achieved by lod models, fog and view distance parameters. Vis areas and portals have to be added manually (which is a real pain sometimes). All rules of making a transition from an outdoor area to an indoor area also apply in FarCry levels, you don't want the player to look into a big detailed room across 2 miles.