Image Based 3d Modeling made easy...

I've been a fan of SketchUp since before they were aquired by The Google.  Now another inovative company has drastically increased SketchUp's potential as a quick previs tool. The guys over at Brain Storm LLC have a plug in called PhotoSketch that lets you quickly go from a few photos to a fully skinned lightweight model in under an hour.  Pretty amazing stuff and at $350, not a bank breaker.