had to start from scratch, zbrush obliterated my uvs on yesterdays attempt, same here, lol... cranked up the polycount to avoid dynameshing, but you have to weld the groups to avoid splitting at the seams, which causes the uv destruction =( gonna have to weld the model, skip the grouping and just split it by materials, which you have to do anyway to use the multimap exporter. example here is a terrifying 12m polys and 1.4GB file size!!! cant do anything with that, lol... i cut back to 3m polys and that seemed to keep the detail, so will try at that level. with the vector displacement brushes you NEED a shitload of polys, have to sink in on that perfect balance between detail and polycount to make things workable.