I'd like this question to serve as a hub for all things realtime shadow related.
What setups and techniques are you guys using to achieve reliable and good looking realtime shadows in your Unity Pro based games? How are you avoiding such pitfalls as giant pixels, shimmering, and overall ugliness? The docs are good, but what isn't mentioned that is must know?
Many game reviewers are looking for realistic lighting effects (even in fast paced racing games). So we could provide two 'light mode'-versions of our games.
One ‘offline’ version for nice looking snapshots and game play movies. And one for the player where shadow and light usage or intensities are reduced to a minimum (depending on camera distances/angles, speed, …).