Been having this problem for a LOOONNNGGGG time. Started with a full level I had painted in shader model 5 while working but when I preview in the mobile shaders it doesnt display. At this point I have created a simple level that is just a landscape of the smallest size and quad number. I placed …

As seen above I was moving everything through a material instance. By simply changing that back to a normal material and feeding each input through a copied/pasted later node it started working