» Tue May 17, 2011 7:22 am
It does for the same for me, even on a 3ghz quadcore and 16 GB of RAM. I wrote it off as yet another bug. If you can't get it running, you can still edit your worldspace directly with the Landscape Editing window; it's a pain in the backside, but it's better than nothing.
If you have it, you may be able to edit the heightmap with FO3's Geck, and Import it into FNV. Not sure if it'll work, but if it's a large worldspace you're making, it's worth a shot.