I have two further regular uses for wireframe.
1. Basemaps
It is very useful for leaving basemaps buried under the ground which will become visible when wireframe is turned on. Textured areas of the ground will have the painted surface temporarily removed so that you can place individual objects, road/rail splines etc. with great precision.
2. Precise landscape modelling
Wireframe will allow much better control when raising or lowering the terrain. Where you grab the surface to make adjustments will considerably affect the result depending on where the compass is placed. At minimum radius, grabbing the centre of a grid square will tend to move the whole square up/down. Doing the same at grid intersections will create a spike or pointed depression.
The alternative wireframe mode, mentioned by
cacaderailroad, will double the number of visible polygons by showing one diagonal line between opposite corners of each grid square. The whole grid has a mesh of much finer lines which are much easier to see. There will only be one diagonal per grid square, but it will flip direction depending on which way the terrain is being deformed. It shows how each triangular polygon is behaving as you adjust the landscape and where the hypotenuse “hinge” is placed when adjusting the right angled grid intersections. It also affects the texturing as these “flips” take place. I understand that newer versions do not have this functionality. It would be nice to believe that this function might be restored in future editions.
Of course, like
pfx I find that I never, ever, have to use wireframe to find buried/lost objects!
(liar) 