TOZ Noise

generating tiling mesh with the noise/density value. for me its critical that it does tile, repeating the exact same pattern in 3 dimensions.

 

Well, i still dont understand what kind of problem you are having.
Just check the plane modüle, its on xz axis and y = 0

You can easily create a new modüle yourself like a Cube or something and use the y variable as well. It will generate your noise.
In order to make a 3d texture, you will also have to copy the NoiseMapBuilderPlane class to something like NoiseMapBuilderCube and add the y axis there as well. And finally you must add ImageMap, NoiseMap support to it and a 3dTexture save function somewhere.

 

The new 3.x version is available on the store now, if you previously owned 1.x, you will be able to upgrade for 5USD.

 

Tutorial video for Unity Terrain.