Short film help

I am currently making a short film about global warming etc… and I’ve come along a bump in the road. This scene is in the dessert with a mountain where the character is. Many dunes and mountains are in the distance. One of the mountains I am trying to fade three materials into each other by having a node sequence like this, (see node system in attachments). When I render the mountain/ Dune thingy it looks like this (see render in attachments). All the textures are located in the node material and applied over uv. I really need help, I think that the nodes system isn’t recognising that the etxtures apply over the uv and not global. By the wasy the textures are black and white to allow the fading.

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