In CAW, look under the Terrain menu tab and choose Export Height Map.  You can edit the height map in the graphics editor and then import it back into the game, preferably into a fresh save in case the new map knocks around items you have already placed.  Bridges may need to be clicked to reconnect them to roads after a new map is imported.

If you're not experienced with a graphics editor, it's worth learning.  Lifehacker has a great Night School series on Photoshop.  For the time being, if you want to post your exported height map, I'll give it a whirl and see if my suggestion actually works.

Hand-holding may not be encouraged here, but it's nice to see signs of life in this thread.  It's disappointing that MATY hasn't shown much interest in CAW as we have a shortage of creatively nefarious worlds.  Not that it matters much for the time being, because Skyrim.

You might want to consider taking this over to MTS, there's plenty of tutorials and threads there to help you. They also love to hold hands and walk people through each and every step. Not that you've met the MATY welcoming committee yet, but it's bound to happen sooner or later.

You might have better luck exporting the terrain to a graphics editor and making changes there.  If you copy a slice of the circle that works, you can rotate/paste until the whole circle is uniform and then import the terrain (making a new save first).  Gradients made in Photoshop don't transfer as smooth terrain, but copying a part that you have already smoothed should work better.

What happens when you zoom in?

Nothing. It's purely an artifact of Create-A-Crap's rendering cutoff points. This behavior is probably not visible in the actual game since you can never pull that far out.

That is a tempfile that gets written out when you do things like travelling. It's harmless, but the data may not be in a consistent state if you attempt to use it as a recovery save.

Two things. First what the hell does this have to do with this thread?

Second, did you actually read through those links you were given for the Exchange threads and check to see if you had some of the problem custom content known to cause this? Don't assume because you haven't installed any custom content in a while that it can't be it. The problems some content creates do not always show immediately.

Also logic dictates that if no one else is complaining about this on Twallan's board surrounding his mods and a lot of people are complaining about this being caused by custom content on the Exchange that it's most likely custom content. Don't think you know better and argue with people or bug people on another forum that isn't even Twallan's about a problem you think is caused by Twallan's mods. Just check your custom content.

As usual, the obvious first thing everyone should be doing when having a serious problem they don't know the source of is to take all mods and custom content out temporarily (move the Mods, DCCache and DCBackup folders out of My Documents\Electronic Arts\The Sims 3 temporarily) and try loading the game to see if the problem is still there. Don't save the game, just see what happens. If the problem does not show this eliminates that your game files themselves are hosed and points that it is indeed something you downloaded.

Next put the mods/packages/hacks folder back in (don't put custom content package files under Mods/Packages/Objects or Clothes etc in yet, just hacks) and try it. If you still don't get the problem it is a piece of custom content.

If you had dug through the Exchange thread your were linked over at Twallan's forum and the further links it gives you would have seen that the known problem files to cause the weird baby issue are as follows:

top-nkd
bottom-nkd
Metallica Magnets logo t-shirt
toddler_tee (with 'milk' written on it)
collectionblondes (has a picture of a woman with a black bikini top and bottom)
New CAS Project
Nightime, Daytime, Everytime shoes
Shymoo

And while you are at it, lookout for "Girl Doll Dressed" the infamous viral doll.

These are things that (should have) gotten installed via the launcher so look for them there and uninstall them if you have them. It doesn't matter if you never downloaded them because they can embed themselves in other sim3packs and sneak in.

There is a Big book of skills on MTS that can also set the skill level of your Sims, including hidden skills. I find it useful for when I don't want to go searching through all of the supercomputer's sub-menus looking for one thing.

Twallanian Story is compatible with AwesomeMod, but you will obviously not be able to use AwesomeStory while using Twallanian Story. In fact, AwesomeMod's Story Driver Options are specifically coded to deactivate if Twallanian Story is present to avoid conflicts.

Yes, almost all of Twallan's mods work with AwesomeMod, but as for the Story Progression, Awesome comes with it's own, so I wouldn't use Twallan's with AM. On Twallan's homepage though, it generally says whether or not it works with AM. So SEARCH MOAR, and all that jazz.

Both links are for the same file. Install the awesome.package file (and the config if you use it) into your mods/packages folder.

Try removing them anyway.  Some hairs have been know to cause problems at different times, and while it seems a direct conflict with AM is unlikely, anything is possible.  I use some of the sliders, and no problems, but the best way to troubleshoot is to try everything, no matter how small or inconsequential it may seem.

Drop ALL mods/CC except for AM, clear the caches, then start a fresh new game and see what happens.  If the game runs properly, try adding the mods/CC slowly and keep checking until you can identify where the problem is.  A fresh new game helps eliminate a dying game as the problem.

Try removing them anyway.  Some hairs have been know to cause problems at different times, and while it seems a direct conflict with AM is unlikely, anything is possible.  I use some of the sliders, and no problems, but the best way to troubleshoot is to try everything, no matter how small or inconsequential it may seem.

Drop ALL mods/CC except for AM, clear the caches, then start a fresh new game and see what happens.  If the game runs properly, try adding the mods/CC slowly and keep checking until you can identify where the problem is.  A fresh new game helps eliminate a dying game as the problem.

Try rolling back your drivers instead? I haven't seen these particular issues but when I updated to 197.45 I did start getting crashes to bluescreen nvblahblah.dll has failed. I rolled back to an older driver and haven't had any problems since. So it may actually be an incompatibility with the newer drivers.

I had floating land when I inadvertently installed Riverview.sims3pack into a .dbc cache, as well as having Riverview.world in my 'worlds' folder.

Are you running other mods, and have you tried removing them and running AM on it's own, even with a fresh game rather than an old save.