Real Time Water & Destruction, InGame Editing & Adding Faces, Lines, Vertex's

I'm slightly curious on what level can unity support, real time water for those of you that aren't aware of what it is. basically real time water is water that acts like that of water you find in the real world.

as in if you trip holding a cup ingame it will spread out and depending on what surface its on and depending on the level of what its been program to lets say there's weather and its sunny you could set it up so that in a given period it would dry up.

Now, real time destruction is basically the same as water, if you shot a large metal slug into the side of a ship at the point of impact depending on the speed and strength of the ship's super structure and that of the material its made from you would see shock waves and compression from the resulting impact and if its fast enough even through and through.

Editing & Adding Faces, Lines, Vertex's and generally geometry. OK, Lets say you've got a custom car game and you want to edit a hood naturally you would need to export model for editing in a program like lets say 3D Max and then import again instead of all that what I'm asking is would unity have the level of support needed to do all this within a game and please i know its a lot better to do it outside of the game but for this question put that aside.