I have a terrain that looks great after I add more elements to the terrain some triangles shift. the shift is happening in areas that were previously processed and that looked good. can anyone help? software: ORD Release 3.

I have a fairly big surface and my file has become pretty much obsolete, everytime I try adding an element or removing an element the computer will just spin for 30 minutes to an hour is their best practices to how to deal with issues like this, I don…