Extract Heightmap fromParallax Occlusion Function for Vertex Painting

Hello guys! Thanks in advance to anyone able to help.

I made a Material Function with a Parallax Occlusion, and this function its in another Vertex Paint Material. The issue I have, its how to Isolate this Heightmap in order to plug it in the HeightLerp. Currently I’m using the Heightmap Alpha Channel from my MRAH directly with the same UV Tiling but its not detecting it the HeightLerp.

Here how I have the setup currently, and is not using the Heightmap for doing the HeightLerp as you can see.

I managed to make it work, now the thing its the Sand its Floating :confused: