Afer managing to migrate a map from City Sample with no big issues, the only problem i found its that some textures on the driveways look like this in the screenshots below. I still haven’t found the reason, any help would be apreciated.
This happens all the time when migrating a material, I still don´t know if there is a fix or not.
But if you add the material function that is missing into those two:
The material will look normal again.
If you don’t remember of have the correct function, go back to the city sample and migrate the function on itself and then add it 
Omg thank you so much. This was the only thing that broke so I was very confused. Happy it is an easy fix.
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