DSO Gaming has confirmed that this cloudy video production is of Stalker Online running on the BigWorld Tech engine. Stalker Online isn't related to the S.T.A.L.K.E.R ip, mind you, and has been worked on by another game developer entirely for quite some time. And while there are plenty of Stalker Online videos available for viewing on places like youtube, this particular new video stands out for its leap in visual aesthetics for the game, despite being filmed off another monitor.
Most demonstrations of games utilising BigWorld Technology showcase highly expansive rolling landscapes and large open worlds, whilst this shows off another side to the Australian developed MMO suite entirely. Looking like something straight out of Fallout 3, it begins with a tour on an underground bunker with some great attention to detail on close quarter environmental objects, as well as some fantastic texture work and lighting.
It looks like it's all still running on the BigWorld 2.0 engine as well. BigWorld 3 promises Realtime shadows, Dynamic time of day, HDR lighting, and ambient occlusion.