Grand Canyon/Monument Valley help

[Lalla]

Years ago I've tried to terraforming Grand Canyon and Monument Valley with terragen classic, with some good results.
Now I want to try with terragen 2, but I need some suggestions.

1) What software I can use to import dem files on tg2?
2) What dems are corrects for this? This site is good? http://data.geocomm.com/dem/demdownload.html
3) Here're some tutorials to do this?

Thanks for help.

[Dune]

Did you try the search function?

[Lalla]

Yes, but I haven't found what I need.

[Dune]

Too bad, but I can't help you here. Don't know anything about DEM's.

[Oshyan]

Terragen 2 can load DEMs natively in GeoTIFF format. Many DEM download sites offer this format. Alternatively you can use the free (though no longer updated) 3DEM downloadable from here: http://www.visualizationsoftware.com/3dem or the free Wilbur: http://www.ridgecrest.ca.us/~jslayton/software.html (supports SRTM and a few other formats I think) One of the best apps for working with DEMs is GlobalMapper, but it's not cheap: http://www.globalmapper.com ($349US)

The best free DEM data you're going to have access to for the US is NED (National Elevation Data). Here's an example terrain list from Sonoma County, California: http://data.geocomm.com/catalog/US/61069/1297/group194-3.html
For more options as well as global data in SRTM, I recommend http://seamless.usgs.gov/ and the various links there. That site will usually let you specify to download in GeoTIFF.

A quick search of the forum for "DEM tutorial" yielded this on the first page of results:
http://www.archer-designs.com/tutorials/terragen2/working-with-gis-data/index.html
That should give you all the rest of the info you need.

- Oshyan