we had to different archicad dcoument. One with a building the other with a topography. We managed to put the building onto the topography document but we realized that their were a problem in scale. So we changed the scale of the topo. By doing so we lost the volume of our topo. When we click to see the height everything is written well but it doesn't appear on our 3d document. Just a plain rectangular green topo with no volume. Another thing is that when we put the building onto the topo. We loose the ground floor. We kinda are in rush. if anyone can help.