This tutorial goes through techniques to rig and animate props and environment objects that you need full control over. Simulations have their uses but in this example, a video game sequence where the player causes a piece of debri to form a bridge, the placement must be the same every time. This can be achieved manually with keyframe animation.
Here is a .zip of containing two blend files from the start and outcome of the tutorial. cgmasters.net/resources/env_anim_tut_files.zip
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