1. Unfortunately, I did not understand what the problem with Path.Combine.
This is a standard class and is available for all platforms except Webplayer.
http://docs.unity3d.com/ScriptReference … mbine.html
https://msdn.microsoft.com/en-us//libra … 00%29.aspx
Prehabs you have a script «Path» in the global namespace?
Do you have such a class, delete or rename it.
2. All except the toolbar and start button, wrapped in ScrollView (img1). You will always see this button.
I do not know a way to hide it.
3. Most likely, you just do not have enough memory to do so many terrains.
Reduce the number of terrains, and/or reduce the quality of terrain maps, and/or convert your mesh in several passes.
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