It's pretty much only in front of the skybox. I'm creating the Overlay as follows.
public void createOverlay(World theWorld, FrameBuffer buffer) {
BufferedImage radarMap = new BufferedImage(targetWidth, targetHeight+5, BufferedImage.TYPE_INT_RGB);
radarMap.getGraphics().drawImage(borders, 0, 5, null);
radarMap.getGraphics().drawImage(logo, targetWidth/2-logo.getWidth(null)/2, 0, null);
Texture radarTexture = new Texture(radarMap);
TextureManager.getInstance().addTexture("SuperRadar", radarTexture);
Overlay over = new Overlay(theWorld, buffer, "SuperRadar");
over.setNewCoordinates(540, 40, 540+targetWidth, 40+targetHeight);
over.setDepth(Config.nearPlane);//THIS WASN'T HERE. I ADDED IT TO TEST WHETHER IT FIXED FOR SOFTWARE (IT DIDN'T)
over.setTransparency(100);
}