This is a truly jawdropping application of SL as an architect's tool, showcasing a prototype revision (created in SL) to a real world building, built by avatars seemingly flying about in double-time.
Watch it here, then read on.
Shooting the Video
Keystone Brouchard: In SL, I filmed the avatars building the architecture in an approximate perspective relative to the real life video of the site. I then stacked and laced the clips together with Blue Screen key modifiers in Adobe Premiere. To keep the avatars' build lined up with the real world building, I made a guideline build out of prims in-world. I then alt-tabbed between the video in Premiere and the SL camera until I had the camera view lined up with the correct vanishing points.
Shooting Time, and Creating the Design
KB: The original footage was 11 minutes 37 seconds. Before I started filming, I made some semi-transparent guides that lined up with the 'bays' between the windows on the real life building.
The design of the virtual addition was derived from the architectural elements used to build Clear ink Island; based on the Barcelona Pavilion by Mies van der Rohe (although applying this precedent to
a third story addition was a stretch).
Real World Applications
KB: Since the video is essentially an illusion (intended to be more of a sci-fi, or "what if" piece than anything else), the applications of this technique on a current real world architecture project are fairly limited, but I'm still working on that! [I think he's being modest, myself; I suspect you could use this technique as a client demonstration right now - HL]