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Solved! Go to Solution.
Solved by dave.wolfe. Go to Solution.
Have you tried changing the viewport layer settings in the 2013 ortho? Yes, in 2014 this is easy.
Make two viewports, and overlay them. One shows the UG, ones shows above ground.
Did you change the level of the clipping plane? Making the UG clip at the top of slab should isolate the portion below ground in the UG viewport.In the AG viewport, make the bottom of the clip top of slab.