Adywan:
"Don't forget that sometimes less is more"
Indeed so, and that's why I won't be overdoing anything. An extended explosion, for sure, but beyond that, I don't think the scene warrants it or could carry it.
And Fishmanlee and Bingowings, the Death Star would have virtually no gravimetric impact on a body as large as Alderaan, so even if such effects were achievable within the scene, the reason for them is moot. And that whole idea is far too complex for Star Wars. It might work on Star Trek, but Star Wars is too "real world" for that sort of thing.