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Construction for After Effects is a script that will create simple image-based buildings in After Effects, creating basic 3D shapes with associated building image maps.

Construction allows you to make cities and buildings in After Effects easily

Construction comes with 10 varieties of buildings and allows you to easily create your own buildings. The buildings are fairly simplistic, but as background scenery, it will do in a pinch. Check out Construction v1.0 over at AEScripts here.