I'm all right with jc, that method works fine. But, as I said above, when re-loading such a terrain, one has no longer the possibility to edit it in Vue's terrain editor (or did I miss a feature somewhere ?) What I'm looking for, is a way to take a Vue editable terrain, fine-tune it in some external application, and then re-load it into Vue, editable as a VueTERRAIN inside Vue's terrain editor. So to go back and forth between the two, to finetune. Up to now, the only way to do that I found, is what I wrote higher up (transferring the whole terrain as a bitmap is sufficient for faeriescapes, but isn't precise enough for exact work). The ideal thing would be some external free program, that saves a 3Dmesh as a USGSdem, because Vue loads those as editable terrains... But up to now, I didn't find such a program... :-( Somebody got info on such ?