Questions about the maps

So, I was wondering what kind of maps Torque3D supports since I have no idea:
Firstly, I'm guessing the maps aren't height maps? That means it's possible to make caves and tunnels?
Secondly, is the terrain dynamic after loading it? Can we alter the terrain, say for example an explosion making a crater?
Is there any sort of limit? And, is there any sort of skybox(I'm thinking of the source skybox especially)?

Hopefully I'm not asking too much, just wondering since Torque3D can differ from game to game
Thanks

(Oh and, isn't Torque3D 3 here?)

 

Firstly, I'm guessing the maps aren't height maps? That means it's possible to make caves and tunnels?

It works with heightmaps, you have the default terrain and you can import a heightmap or just edit the terrain yourself with the editor.

Secondly, is the terrain dynamic after loading it? Can we alter the terrain, say for example an explosion making a crater?

Nope.

Is there any sort of limit?

No limits.

And, is there any sort of skybox(I'm thinking of the source skybox especially)?

Yep.

 

I know caves were possible with voxels in ce3, haven't made a map since. I hope they are in t3d 2.0

 

I thought t3d wouldn't use heightmaps, oh well.