I'm new to sketchup (about a week) and I've been using it to build a 3D model of the interior of a new office I am building. I'd like to be able to do a true "walk through" of the model once I am complete the but the built in walk through tool is, let's admit it, barely even passable. I was hoping that one of you might know of a plug-in or even an external app that could render the model and allow a true walk through so that I can get a human perspective on the interior as if I was really standing in the model.

Any ideas or is this simply not possible?