Celestia Forums

Looks like I will be able to keep my promise on this one after all. The Zip contains several versions of the texture in both png and dds format and in several sizes. Again this this textures maximun resolution is only 4k so don't expect miricles. Here are some aditional pics.





In these pics you can also see my recolored Aurora.

You can downlaod the texture package here. http://63.224.48.65/~impulse/Earth18kBC ... 000BCE.zip

Let me know what you think of this texture. If anyone finds something thats realy strange let me know and I can always fix it.

Don. Edwards

thanks Don for sharing this great project/work, it was worth waiting for :}

Those pictures really are obscenely good, Don... nice work!

I unziped all the package to the Extras folder and did the following in solarsys.ssc:
"Earth" "Sol"
{
Texture "Realistic-Earth16k.dds"
NightTexture "EarthNight8K.dds"

#SpecularTexture "earthspec.png"
Color [ 0.85 0.85 1.0 ]
SpecularColor [ 0.5 0.5 0.55 ]
SpecularPower 25.0
HazeColor [ 1 1 1 ]
HazeDensity 0.3
Radius 6378.140 # equatorial
# Oblateness 0.0034

# BumpMap "earthbump.jpg"
# BumpHeight 4.5

Atmosphere {
Height 60
Lower [ 0.43 0.52 0.65 ]
Upper [ 0.26 0.47 0.84 ]
Sky [ 0.40 0.6 1.0 ]
Sunset [ 1.0 0.6 0.2 ]
# Sunset [ 0.3 1.0 0.5 ]
CloudHeight 7
CloudSpeed 65
CloudMap "earth_cloud_2x2k.dds"
}

CustomOrbit "vsop87-earth"
EllipticalOrbit {
Period 1.0000
SemiMajorAxis 1.0000
Eccentricity 0.0167
Inclination 0.0001
AscendingNode 348.739
LongOfPericenter 102.947
MeanLongitude 100.464
}

RotationPeriod 23.9344694 # 23.93419
Obliquity -23.45
RotationOffset 280.5 # offset at default epoch J2000

Albedo 0.30
}

AltSurface "limit of knowledge" "Sol/Earth"
{
Texture "Earth18kBCE-4k.png"
SpecularTexture "18kBCE-SpecMap4k.jpg"
BumpMap "Earth18K-BCE-Bump4k.jpg"
BumpHeight 4.5
}
And the Earth became a white ball,with no texture at all.What I did wrong?Did you intend to use Earth18kBCE as an alternative texture?

Hello Daniel

I've just this very minute installed this as an alternate texture using the DDS textures, and all is looking fine. I especially like the shiny Amazon!

Here's my alternate texture SSC, which is in my 'Extras' directory in a folder called 'Earth18000BC' ;



I also put my textures firstly into a folder called 'Medres', and then put this into another folder called 'Textures' before placing this into my 'Earth18000BC' folder. Hope this helps?

regards
TERRIER

I did exactly as you said,copied your ssc and now Earth is a grey orb.Do I need the continent drifting addon?The main Earth texture have to be 4k,too?

Daniel

No, you don't need the continental drift add-on!!!

Don't forget that I've used the DDS textures and the normalmap, whereas you've used some of the jpg/png textures and a bumpmap. Going from the information of your first post, your SSC should read;



I'm also wondering if you can use DDS textures ?, as they will help your computer to perform better when viewing them. They should also allow you to run larger sized textures too. I used to have a GeForce4 MX440 and could just about run (1FPS!) Dons 16k DDS earth texture with all the eye-candy on, and with a 4k bump map.

regards
TERRIER

Thank you very much for the hard work Don, well done.

Don, I love your texture, but there's one thing I must say, I really don't think Hawaii should be on the map, I mean it's a volcanic island, so it wouldn't have snow if it was even in existance then, which I doubt to begin with. But other than that it's great!

billybob884,
Have seem the top of Mauna Loa? It is 13,679ft high and snows there to this day as well as on the highest peak on Maui, Haleakala at 10,023ft. Both peaks have observatories and both get snow quite often. It being a colder climate 18,000 years ago I would find it odd if there were not any snow on these peaks at this time. So your assumption about no snow in Hawaii is all wrong. Also why would Hawaii not be there in the first place? We are talking 18,000 years ago not 18 million. Trust me, the Hawaiian islands then were pretty much as they are today and they exsisted 18,000 years ago. There were just no people there at that time. The islands are millions of years old!
I just thought I would straiten this out. Many of the tropical and equatorial mountains had snow on them during the ice age.


Don. Edwards

Don. Edwards wrote:We are talking 18,000 years ago not 18 million.

Woops, missread that.

Hi Don,

Thank you for the texture it looks really great ! I downloaded and installed
I also think that the snow on Hawaii is exaggerated. Almost all parts of earth were colder during the ice age, but the tropics about 2°K and polar regions up to 20°K and even more.
I found a page
http://www.gfdl.gov/~gth/web_page/miles ... ouffer.htm
it shows the temperature difference between nowadays and the time of 21000 years ago.

Another map I found is :
http://www.geo.cornell.edu/geology/clas ... CLIMAP.jpg
It compares summer pacific temperatures between 18000 years and nowadays.
The ocean around Hawaii in August during the ice age has 26°C and nowadays too.

That means Hawaii islands were maybe 1°K to 2°K colder during the year, more in winter.
So the snow line on the Hawaii mountains was about 200 to 400 meters lower..since average temperature cools about 6°K every 1000 meters of altitude in the tropics.
Seeing earth from space maybe the high mountains of Hawaii were a bit whiter, but really not as much as the texture shows.
Karsten

But I was running Realist Earth 16 k dds with 30 fps.My video card,obviously support DDS textures.I am wondering if the Celestia is not recognizing the textures.Maybe I should move it to med res main Celestia texture?
Here ?s my present directory :
Celestia>Extras>Earth 18000 BC>Textures>med res>Earth18k...
I was wondering if the problem could be the ssc,stc and dsc not available in the package.I only found the textures.
What can you say,Don?

danielj wrote:Here ?s my present directory :
Celestia>Extras>Earth 18000 BC>Textures>med res>Earth18k...

Just save the code posted by TERRIER to:
Celestia/Extras/Earth 18000 BC/Eart18000BC.css
After restarting Celestia you can right-click on earth and choose this texture as "Earth 18000 BC" under "Alternate Surfaces" (<- or something similar)

Hope that helps
steffens

PS: "med res" should be "medres", without space

Don, Thank you very much

Thanks,Steffens.Now it is working.I hasn?t realized that I need a separate ssc file to the Earth18000BC,to make work.

Whoa! This is some great stuff! I'm racking my brain trying to think of what I could use it for...but I'm at a loss, seeing as I'm not teaching a class on this kind of stuff, or anything like that. *shrugs*

I gues I should have made it a little more clear. This texture is basicly a Northern Winter, Southern Summer texture. As such thats why there is more snow and ice in the north than the south. Hope this helps explain a few things about this texture.
What I would to know from everyone is how the color looks. At home on my machine the colors look as I expect but at work on my 17" superflat Trintron monitor it looks rather on the green side. I am sure this has to do with the color calibration of the monitors. So the question is for everyone just how green does the landmasses look on your systems and if they apaer to green should I do some adjusting?

Don. Edwards

Don,

On my Hitachi monitor, the groundcover looks more olive than green in the pictures that you posted in the first page of this thread.

Otherwise, it looks cold!

No problem here Don, The colours look very good to me.

With my new TFT flat pannel monitor connected to the digital connector.
I don't have the ability to change the monitor colouring.
a bit like an RGB scart cable to a TV.

I have spent hours looking over thhis texture so far.
flipping back and farwards between the current Earth and this.
It is odd to see lots of green vegitation on what is now Australia
things did indeed look very different back then.

thank you once again for a great addition to Celestia.