I've got a interesting problem where my render is set to displace and bump in the material settings, and when set to the cycles engine, renders just fine with all my textures including bump and displacement. I've tried googling the absolute hell out of this but people have problems in other similar, but not exact areas. Here are some photos of my shader (Which I doubt, as it works in the viewport, just not final render). And an image to show you guys the before and after render. The shader is just a sample cause it's huge, but its all the same, just with different textures blended in. Here is an example of 1 plus the mix shaders and their masks.