Derived layers
Layers made from others: upper / lower envelope, difference, cutting and filling rows, offset and interval layers, road crust layers. They are kept and worked out again after edits.
Commands
CXDERIVEDerived layers (cut/fill rows, crust)…
Upper / lower envelope, difference, cutting and filling rows, offset and interval layers, road crust layers (BC, DBM, WMM, GSB); re-run after every edit.