I'm not entirely sure what you are talking about, but it sounds like you mistake my list of possible surface properties to shadow umbra/penumbra.
I certainly do not propose using only realtime solutions, using mostly pre-computed environments and light transport information has very nice advantages in simple scenes.
Light is additive, you can add realtime calculated lights on top of precomputed ones.
If you have stored enough lighting information and source locations you can quite easily add shadows of moving objects to scene.
More complex methods are possible as well, traditional pre computed radiance transport and light probe methods work as well.