I made two tests with the two “test files” from ZBrushcentral, the primitive man head, and the sword. The sword rendered perfect, but I got many artifacts on the head. I then took the head to Cinema4d and applied a hypernurbs on it ( subdivision modifier), and imported it back into Vue, then the displacment looked a lot better. The maps were GUV, so I don’t know if other map formats work, since I don’t have ZBrush.
The one thing you need to do so it works in Vue is change the y value of the map to -1 in the function editor, because by default in Vue black means 0 and white +1, changing the y value to -1 makes the neutral grey become zero, as it is in ZBrush.