Release V0.3
Known Issues:
 - The edges of the meshes cannot be coloured in yet. Oops, you can go and edit the images directly though
 - When Mesh Resolution is greater than 1, UVs take the day off.
 - High resolutions eat frames, a lot
 - Painting over mesh seams cause lag
 - ColorPicker has some issues. It's built into the engine so not my problem :)
 - When the terrain is wildly mountainous, the painting tool can become inaccurate

Terrain Parameters and what they mean:
 - FileName: The name of the map, simple as that.
 - Mesh Size: The size of an individual mesh, a mesh that is 4 by 4 would have 4 by 4 heights
 - Mesh Count: The amount of meshes, think like chunks
 - Mesh Resolution: Increases the count of in between vertices, deletes frames, makes UVs take the day off, leave at 1.
 - Mesh Scale: Sets the maximum height allowed by your Terrain, lower values give greater precision.

Files are saved at C:\Users\<you>\AppData\Roaming\Godot\app_userdata\TerrainEditor\terrain
also known as %appdata%/Godot/app_userdata/TerrainEditor/terrain

Thanks for trying out my Terrain Editor!

Tips for serious map creation:
Make the general shape in the Terrain Editor, paint over the spots you want for specific sections using the painting tool. Save and go into your favourite texturing tool and use it to create the actual textures for your map. After finishing, go back into the Terrain Editor and make finishing touches to the heights. Smooth over it using the smoothing tool at low power.