A Surface is a an object that helps make the 3D model look "solid". Surfaces are applied Materials such a colors and photo-textures to make the model look more realistic and have trims and holes applied to help refine their shape. Surfaces are the only object in PhotoModeler that can be photo-textured.
Surfaces can be created as paths, triangles, lofts, sweeps, revolutions, silhouettes and Fit NURBS Surfaces. See the Creating Surfaces section for details.