If you need fine details, like for eye lashes, tree branches etc you will need AA. If you want those soft shadws really soft, you need AA. Hair, you'll need AA. Smooth volumetics, you'll need AA.
I find it strange to hear that you want next to none anti-aliasing.
The only time I could think that I wouldn't need it is if I didn't want the best out of my scene or I was going to heavily postwork it in such a way that any jaggies or artifacts would be covered up anyway.
I admit that certain AA settings are not perfect, that's why we have user settings. If you really want your image to be really sharp then sharpen it in postwork. This way you have benefitted from using the AA in the render for optimum effect & then got your sharpness just as you want it afterwards.

Just thought I might revive this topic. I kept on experimenting with Terragen realism in Vue and I think I am getting closer. I bought Terrapack, but more for the sake of seeing if Chipp Walter's approach was similar to mine (from the technical side of things). As it seems it was not, altough Chipp mentiones in his manual a lot of things I had never thought about. ;-)

This is my latest result of reproducing Terragen's surfaces (click to see a bigger version):

It's a simple Terrain created in Worlmachine (four 512x512 Terrains combined in PS Elements), imported as a Procedural Terrain in Vue and textured with a comepletely selfmade procedural (!) three-layered material. It's not perfect (a shoreline is clearly missing etc.) since it is still a work in progress. Rendered out with a resolution of 3200x2400 on Ultra with "Crisp" antialiasing, then downsampled to 50% size in PS Elements and some slight sharpening. Rendertime was about two hours on a Core 2 Quad with Global Ambience. The water is the one from Terrapack.

This is a crop from the original 3200x2400 render:

I keep on experimenting, and as soon as I am content with everything I'll write a tutorial, but that might still take some time :-)

wow this is something. You're going really Terragen there.

The Terrain bumps are fractals?

I'd definatly like to know how you made that :)

I'm also very curious about how your material distributions look like.

Sadly, I couldn't see your images. I guess your server has a problem with them.

You mentioned:

Quote - It's a simple Terrain created in Worlmachine (four 512x512 Terrains combined in PS Elements), imported as a Procedural Terrain in Vue and textured with a comepletely selfmade procedural (!)

How exactly did you import the image as a procedural terrain? Do you mean you used the texture map tile of a procedural? If so, was your image a 16-bit image? I'm pretty sure you don't need to go the procedural route and can import the image directly.

A very good way to create texture in Vue is to render very large and downsample, then sharpen. The downsampling helps remove some of the noise, and the sharpen can help exaggerate texture.

Hopefully you'll repost the images so we can take a look!

The terrain is stunning hope you get around to writing your tutorial.

I can now see the images...and the landscape looks great! Good job!