I have created a 3D site model from a traced contour site plan (using stakes), of existing and proposed contours. the contour lines view in 2D top/plan, and 3D isometric views, but the surface is transparent. 3D poly lines representing property boundaries have been applied to the surface, and lines extend from plan set-up to the surface. When viewing in 3D the lines are still visible and I cant get the surface to render at all. Is there a way to correct this? Is there a way to drape the aerial photo over, or 'stick' it to the surface?