How can I tell what textures a scenery needs?

I have a scenery from the Philippines for FS9 and for some reason there are a
lot od white walls in it. I think they should be covered with tree textures.
Is there some utilitu that tells what textures are required or what textures
are missing?

When I looked at another computer with the same scenery there was no problem
and that's how I figured there are tree tectures missing or in the wrong place.

Maybe someone can help.

Thanks for your time.