How to create a gradient texture from two different 3D materials, for example this post:
(How to create a gradient texture from one material to another (opaque to clear)?) shows how to do this exactly but WITHOUT a 3D texture, my question is how to do this with a 3D texture, where each of the two textures has a different normal map, how would you combine them using a gradient(or fade or merging effect) of two different 3D textures, is this even possible?
I ask this because I'm trying to make a beach using two different textures with each there own different bump map and normal map, here is an example of what i have thus far:



