Users can see the model through the "eyes" of a virtual human character who is aware of obstacles and their size and can navigate through the structure as if walking like a human being, rather than viewing it from preset vantage points or flying through it like a ghost. When the virtual visitor climbs stairs and ladders and negotiates passages through a model of solid objects, the full collision detection feature makes clearance problems obvious.
A fully functional free demo can be downloaded at www.walkinside.com.