Autodesk Civil 3D 2012
I have a model it’s based on a site with grading objects. my grading object have 5 different targets along the run. when I first set up every look right, even the model. when I look at the site property it show all the surface targets. when I close and open the drawing some of the grading object are not in the model anymore. The grading object show the correct target surface. The site property is missing the target surface. any ides would be appreciated.
This is why I don't use gradings...Sorry for the bad news but IMO gradings disappear and become corrupt (or vice versa) if you do not explode them.
John Mayo
I'll add my 2 cents
I would say "projection" grading can be finicky but gradings (infills and feature lines) IMHO are quite stable. I'd go as far as to say more stable than adding feature lines to a surfacce as breakline data.
Try it you'LL like it - makes grading more like grading instead of modeling.