First render + wireframe of the dam WIP.
Started with some lofts and trimming to get the base surface,
converted to polygons and added the details. Currently the wireframe is in a very bad shape...

Same video but on youtube.
http://www.youtube.com/watch?v=lVrhbv6xtY4

It went very fast with the second tentacle and the camera (draft camera of course). So here is the version 1 of the pre-viz animation. I don't want to get into the motion details, or environment...

Nice. Good luck

Done some animation for the first tentacle.
It went a bit berserk and destroyed the tower things too :D.
I guess I'll need two more tentacles with the same uncontrollable behavior and I'm done with...

Well yeah :D but although the scene is not a realistic one,
I think every effort should be made to make it look like realistic. And if I was the monster with the tentacles destroying the Hoover dam...

Another thing you can try. Maybe the lower building you built isn't the correct size or shape. You can use google earth to get a top view reference.
Hope it helps.

Have you tried to adjust the camera's
angle of view and focal length?

Started to work on a pre-viz animation.
There will be no dam break yet, just going to figure out the tentacles, and camera movement.
After this stage is finished I'll mark up the parts of the dam...

Here we go.
This is the basic concept of the animation.

1. First tentacle comes up from under the water and hits the upper part of the dam.
2 Second tentacle grabs the tower (or whatever it is),...