Evening in Europe

Started by 3DGuy, March 09, 2007, 06:29:33 pm

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3DGuy


Something I've been playing with because of a thread about planet maps. The original earth texture is  21600 x 10800, but TG2 just told me it couldn't load that, so I downscaled it 50% (10800x5400). Is there a maximum resolution TG2 supports?

Other facts: used a cloud coverage map as a filter for the cloud distribution. used a mask image to put a water surface on the oceans. If you look carefully at Spain you'll see the reflection of the sun in the water there.

Just can't figure out where the line in the atmosphere is coming from. It seems to follow the light/shadow border.

old_blaggard

That line is a known bug - I'm not sure if anyone has found a workaround for it.  You beat me to this, by the way - I just started playing with an Earth image about half an hour ago ;).
http://www.terragen.org - A great Terragen resource with models, contests, galleries, and forums.

Oshyan

Nice image. We've seen the atmosphere/cloud banding issue before but I don't recall the steps to reproduce it. I presume it occurs without the Earth texturing. If so can you share the .tgd file for diagnoses?

- Oshyan

3DGuy

I cleaned out the file and came to the conclusion it's the altocumulus layer that is causing the problem. Turning off that layer makes the problem go away, but then there's no clouds :P. I've attached the minimal tgd for your reference.

Dark Fire

That is a wierd error, and a very nice picture...

Oshyan

The banding appears to be a shading error. It will be fixed in a future release.

- Oshyan

3DGuy

Well, I solved it for now. I had the coverage adjust at +0.05. Setting it to zero removed the band.

Also did some small other tweaks to the atmosphere.

old_blaggard

Those are some nice-looking planetary cloud formations.  Do you mind sharing some of the settings or the .tgd?
http://www.terragen.org - A great Terragen resource with models, contests, galleries, and forums.

FrankB

Awesome stuff. Thanks for showing.

Cheers,
frank

3DGuy

March 11, 2007, 07:53:46 pm #9 Last Edit: March 11, 2007, 08:16:59 pm by 3DGuy
They look nice because they're actual formations  ;D
I got all the images from here, including the image I used as a mask for the cloud layer:
http://visibleearth.nasa.gov/view_set.php?categoryID=2364

There is some masking going on in the TGD as you will see. I made the mask myself by using one of the earths images and just selecting the water. Made that white, the land is black.

Space renders are quite fast :P image took around 15 mins to render in quality 0.75

rcallicotte

Very generous, 3DGuy.  Thanks for the additional input. 
So this is Disney World.  Can we live here?

Dark Fire

Perhaps, with some improvements, this image could be a contender for the TG2 logo. However, I am not sure what licence those NASA images are released under...

3DGuy

I did post a version of this on rendo. In that picture the continents are a better visible:



I did this by changing the the tickbox for linear data in the image shader.

Dark Fire

That's much better. I was thinking of complaining that everything on Earth looked a little too blue in the previous render, but I have never been to space so I was not sure whether I was right or not...

Oshyan

Realistically I would think it should be darker as in the earlier image. You might be able to offset that and also achieve a cool effect by setting up a luminosity map using the "emissive light" maps of Earth like this one: http://www.pruetts.com/images/earth-at-night-1600x1200.jpg

Also Earth *does* look really blue from space. ;D
http://starryskies.com/articles/2003/08/space.station.jpg
http://static.howstuffworks.com/gif/space-station-earth-view.jpg

- Oshyan