Well, I am not a specialist, but anyway I''ll try to answer your questions (I''m sure I''ll be corrected if I''m wrong
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):
-Yes, I think it''s really worth it, because somehow the brain is trained to get sceptical, if it sees a picture without radiosity on it. If you add radiosity, the obvious effect on the image might be small, but the lack of it is one of the things that let a picture look somehow ''artificial''.
-Well, afaik, the path of an animated light is fixed, so you can precalculate it''s effect on the static geometry into animated lightmaps. A lightbulb that swings might be a good example.
Dynamic lights could be also called animated as they most likely won''t be fixed, but unlike the animated lights they can freely move around and change their parameters according to the game, well dynamically
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. For example a rocket that lights a dark hall. You see, it is simply impossible to precalculate them(Ok, with some GB of RAM it may be not
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)!
And yes, both could cast shadows, etc. but always remember: dynamic lighting is calculation intensive...
Yesterday we still stood at the verge of the abyss,
today we''re a step onward!