Brown Dwarf texture

Tips for creating and manipulating planet textures for Celestia.
Topic author
praesepe
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Brown Dwarf texture

Post #1by praesepe » 05.02.2003, 16:45

Hi to all :)

I've uploaded my Brown Dwarf texture set to my site for all who wants it. This new texture also features night side glowing according to some artistic recreations seen in Extrasolar Visions website. Both night side and lit side maps are in 2K DDS format :P

Here are two screenshots:
Image
Image

And here are the ssc settings I use:

Code: Select all

Texture "browndwarf.dds"
NightTexture "browndwarfnight.dds"
Atmosphere {
                Height 900
                Lower [  1 0.3 0.1  ]
                Upper [ 1 0.3 0.1 ]
                Sky [ 1 0.3 0.1 ]
}
Last edited by praesepe on 18.03.2003, 16:17, edited 1 time in total.
Greets :P

praesepe

chris
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Brown Dwarf texture

Post #2by chris » 05.02.2003, 18:00

praesepe wrote:Hi to all :)

I've uploaded my Brown Dwarf texture set to my site for all who wants it. This new texture also features night side glowing according to some artistic recreations seen in Extrasolar Visions website. Both night side and lit side maps are in 2K DDS format :P

That brown dwarf looks great. In fact, I think that the image from Celestia looks better than the picture at Extrasolar Visions! I'd like to include them in the base Celestia package--would you be willing to allow this, and if so, could you provide jpegs or pngs?

--Chris

Topic author
praesepe
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Brown Dwarf texture

Post #3by praesepe » 05.02.2003, 20:48

chris wrote:That brown dwarf looks great. In fact, I think that the image from Celestia looks better than the picture at Extrasolar Visions! I'd like to include them in the base Celestia package--would you be willing to allow this, and if so, could you provide jpegs or pngs?

--Chris


I'm glad you like my textures!

And of course, you are free to include and distribute them in the base Celestia package; I'll make a jpg version and do the proper upload within the next minutes :P
Greets :P

praesepe

Topic author
praesepe
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Brown Dwarf texture

Post #4by praesepe » 05.02.2003, 22:27

praesepe wrote:I'm glad you like my textures!

And of course, you are free to include and distribute them in the base Celestia package; I'll make a jpg version and do the proper upload within the next minutes :P


Ready, a jpg set is now available, check my website or follow the direct link instead :wink:

http://www.la-guarida.com/Celestia/Textures/BrownDwarfJPG.zip
Greets :P

praesepe

slashi
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Contact:

Post #5by slashi » 18.03.2003, 15:40

How to install this package and associate brown dwarfs with the texture/model?

Topic author
praesepe
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Post #6by praesepe » 18.03.2003, 16:28

One easy way to do so is to overwrite the old "browndwarf.jpg" with this new 2k version so all the ssc files refering to the old texture (extrasolar.ssc) should now use the new one.

But you won't see the nightside effect if you don't add some code manually to the ssc files (extrasolar.ssc or any custom file), these are the settings I use:

Code: Select all

Texture "browndwarf.jpg"
NightTexture "browndwarfnight.jpg"
Atmosphere {
                Height 900
                Lower [  1 0.3 0.1  ]
                Upper [ 1 0.3 0.1 ]
                Sky [ 1 0.3 0.1 ]
}
Greets :P

praesepe

slashi
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Contact:

Post #7by slashi » 19.03.2003, 11:06

I cant' get it working. I see 2 dds (I've copied it into models folder) files and 2 jpg (into medres folder) files.
What is the file I must edit with your

Code: Select all

Texture "browndwarf.jpg"
NightTexture "browndwarfnight.jpg"
Atmosphere {
                Height 900
                Lower [  1 0.3 0.1  ]
                Upper [ 1 0.3 0.1 ]
                Sky [ 1 0.3 0.1 ]
}
?

And what sample object I can select to see how it is working?

Topic author
praesepe
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Post #8by praesepe » 19.03.2003, 12:39

slashi,

The dds files are not models, they're just graphic files in a special compressed format (DXT1c) and are exactly the same textures as the jpg's. In order to use them you've got to edit or create a custom ssc file wich makes reference to the texture you want to use. Let's see how it works:

Create a text file called test.ssc and save it with ssc extension in the extras subdirectory, and copy and paste this code:

Code: Select all

"Brown Dwarf Test" "Vega"
{
      Texture "browndwarf.jpg"
      NightTexture "browndwarfnight.jpg"
      Color [ 5 1 0.9 ]
      Radius 70000

      Atmosphere {
                  Height 900
                  Lower [  1 0.3 0.1  ]
                  Upper [ 1 0.3 0.1 ]
                  Sky [ 1 0.3 0.1 ]
      }
      EllipticalOrbit {
      Period 200
      SemiMajorAxis 70
      Eccentricity 0.048
      Inclination    1.3
      MeanAnomaly    0
      }
      RotationPeriod      10
      Albedo 0.40
}


Save it, start Celestia and go to Vega, then right click on the star and select "Satellites" and then "Brown Dwarf Test" you'll see this:

Image

This will place an imaginary (not real!) brown dwarf orbiting Vega. A file that specially points to brown dwarves is extrasolar.ssc (makes reference to extrasolar planets orbiting stars, and also brown dwarves, i.e "70 Vir b")
Greets :P

praesepe

alan_federman
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Location: Silicon Valley

Protostar?

Post #9by alan_federman » 24.03.2003, 23:08

Anyone have a good protostar model and texture? Maybe a Brown Dwarf with a fancy cloud and perhaps a comet tail. It would be a gas. (Oh I hate my puns.)
Alan Federman

alan_federman
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Location: Silicon Valley

getting the brown dwarf to glow

Post #10by alan_federman » 25.03.2003, 02:05

I downloaded the dds and inserted it in 70 vir. I wanted to give it a thick
atmosphere(10x), but something odd happens. The terminator neatly slices the the atmosphere in half. Any way to define the luminosity source as internal vs external. Is this a bug, or just a consequence of making atmospheres disappear at night.
http://exp.arc.nasa.gov/bd.jpg
Alan Federman

chris
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getting the brown dwarf to glow

Post #11by chris » 25.03.2003, 02:20

alan_federman wrote:I downloaded the dds and inserted it in 70 vir. I wanted to give it a thick
atmosphere(10x), but something odd happens. The terminator neatly slices the the atmosphere in half. Any way to define the luminosity source as internal vs external. Is this a bug, or just a consequence of making atmospheres disappear at night.
http://exp.arc.nasa.gov/bd.jpg


Add the line:

Emissive true

to the definition. This turns off lighting, so you'll see the atmosphere around the entire object.

--Chris

Michael
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Joined: 27.02.2003
With us: 21 years 8 months
Location: Massachusetts

Brown Dwarf

Post #12by Michael » 28.03.2003, 06:53

So.... where do I find the Brown Dwarf?? I have copied the files and edited the .ssc file for the jpg. How do I get to the Brown Dwarf Star??
Maybe you all know which stars are brown dwarfs, but I do not!
Thanks!
.... is there anybody out there?


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