How can I get my 3d vectors drape over the surface of the terrain?

juandiegoboh

Hi, I am a bit new using global mapper, I am trying to show some 3D vector data (buildings, vegetation, bridges) and display that over a terrain model using the 3D viewer, but I cannot configure it properly to actually have my features draped over the terrain, they just appear over a plane in lower elevation than the model. I attach the picture of what I have in this moment. 

Thanks