With the latest version of Trainz, I thought I might see a cure for the dig hole anomaly whereby the terrain does very weird things in the vicinity of the dighole (usually a square or two of terrain which reacts as if it is many metres lower than the actual terrain you see). I've seen it mentioned for years now and still it persists. Is there any chance that this will be resolved or are we faced with having to do the old workaround of putting tunnel portals well clear of the dig hole?