I've changed the jungle and water textures in this next pic. I don't like the result that much, due to it not fitting with the rest of the image, though I think it will once I also add real-world or, atleast, realistic looking textures to the remaining layers:

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Name:	Valdin - Realistic 2.png 
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However, I really don't know how to do the rest, because they are directional (slope direction, street direction, building orientation, etc.).