I'm wondering if someone with a bit more experience can help me here. I tried using some dems from here:
http://edcftp.cr.usgs.gov/pub/data/DEM/250/A/
and after I gave them a .dem file extension there was no problem getting them into Vue.

I have some Australian dem files with an .xyz and .grd file extensions and I can't get them to import into Vue. (Just changing the ext. doesn't work.) Like the files from the above link they are an ascii format clearly indicating point positions in 3d.

Can anyone offer some helpful info for converting them to a useful format?