So I thought I'll make a list of bugs that I found while using the editor.
* Using both mouse buttons to move around while having the raise terrain tool active causes it to raise the terrain on the point where I started moving. Of course this also happens with other tools.
* Changing the material of a terrain after creating it in the sidebar seems to be impossible. As soon as you open the resource manager the sidebar changes it's content to the texture that I select (so I can no longer assign it the terrain). I could probably copy the GUID of the texture and click on the terrain again but that is not really intuitive.. (hope this makes sense)
* Just cosmetic, but still: the button for clearing the search box in the terrain panel still has the default tooltip that you get from the IDE, "toolStripButton1". Also there is no delete button for the terrain.
And some suggestions:
* Why the hell is it called "SideBar" and not Properties? That would make so much more sense.

* Terrain preview would be extremely useful. You can already switch between detail and tile mode in the resource manager - a preview mode would be great.
* Why do the up/down cursor keys zoom in and out instead of moving like the other two keys? It would make more sense for me if for example PageUp/PageDown would be used for zooming.
I will add more stuff when I find it. I do hope you intend to make the editor a lot more intuitive than it is right now!
