Hello all,I cannot figure out how to create a solid surface on top of  the retaining walls and also how to grade the transitions for the high to low points of the retaining wall. This would be so much easier for me in Solid Works ><  Any help would be appreciated.Doug

It appears that all of your walls are surfaces and not solids.  I suspect that you extruded a series of lines.  Is that correct?Did you know that a solid can be created using the Press/Pull command?John Connor2011-05-17 12:39:20

Looks like someone posted an answer to your question over at CADTutor.