I made these sky cubes for my project, but I'm not really too serious about my project so I thought I might as well also donate them to someone who might find them useful. There are four:

Standard daytime sky:


Rainy-time sky, works well with fog and a rain effect:


Pink dawny/dusky sky:


And a more "busy," intense sunset sky:


I command you to use these for any purpose, casual, professional, unprofessional, cool, notcool, or really notcool. You don't need to ask me and you don't need to give me a free copy of your game. Just have fun with them and think about me sometimes.
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If you need help implementing them into your level, ask me and I can help you.

Good tidings.

Logan

Thanks!

Wonderful! Thanks a lot.
The last one is so romantic

Nice!
Good Terrain, as well...

Thank you very much. Simple multitexture shader with these 3 textures. Made by Graphtallica for Half-Life I think way back in the day, but free for use for all 3D applications. They're yours.

great skies, i like the first and the second one.
also for the terrain-textures

thank you

Great contribution!

Great skies, indeed. Would you mind it to upload them again in the next higher resolution (height = 1024px), please? That would be great

Other than that: have you read special tutorials how to obtain a skycube from a terragen scene? Is it possible to extract a skycube and cloud layers from Terragen?

Thanks. Thats exactly that what i need for my game

Great guys, glad they were of use.

@Heelx: Unfortunately you can only render images of a certain size with the unregistered version of Terragen (and the registered version is $99)! So the maximum square power-of-two size you can render is 512x512. So I can't render them any bigger... too bad, I too would like to have them at at least 1024. In my opinion the biggest problem area (i.e. blurry/boxy) is the terrain, so I'd recommend just covering it up with a scene map if you need to. And if the clouds are too blurry for your taste, I'd also recommend adding a low-alpha sky dome texture layer over them, to spice them up a bit. (I recommend doing this anyway--it really brings them to life. See readme.txt.)

And yes, there is a tutorial for using Terragen for skyboxes on Acknex Unlimited. It's by Steempipe, and it's for A6, but it should work just fine. My addendum to his tutorial is that you have to rotate the 5th bmap 180 degrees before making a panorama.
EDIT: Shoot, I can't find the tutorial there now. I'll upload it in a second.

I'd encourage anyone who is impressed by these to download Terragen and work on some of your own. Just keep in mind that the maximum height for your skyboxes is going to be a 512 unless you shell out the $99.