More Detail for Minor Moons

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CM1215 M
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More Detail for Minor Moons

Post #1by CM1215 » 18.12.2017, 15:34

I've taken a look at the minor moons in Celestia and have recognized that most of them need improvement, especially the minor moons of Saturn, which have been photographed in detail already. I am looking for methods to add detail to the minor moons to make them look more photo-realistic. Does anyone have any methods to do so?

To start off, here is my attempt at improving Saturn's moon Pan, using textures from Celestia Origin:
PanInfo.PNG
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Post #2by Art Blos » 18.12.2017, 15:52

The only adequate solution is to create individual models for each moon, comparing it with photos. It's difficult, but possible.
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Post #3by Askaniy » 18.12.2017, 15:54

I have plans to improve 3D models of minor moons for the Celestia Origin in 2018.
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Post #4by CM1215 » 18.12.2017, 21:02

Askaniy wrote:I have plans to improve 3D models of minor moons for the Celestia Origin in 2018.
That will indeed be something to look forward to.
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Post #5by FarGetaNik » 18.12.2017, 21:25

I did some improvement on minor moons. For example Pan:

Code: Select all

"Pan:Saturn XVIII:S 1981 S 13" "Sol/Saturn"   # Cassini-epoch data
{
   ...
   SemiAxes   [ 17.2 15.7 10.4 ]
   Mesh      "roughsphere.cms"
   ...
}


roughsphere.cms being

Code: Select all

SphereDisplacementMesh

{
   Size [ 1.0 1.0 1.0 ]
   NoiseOffset [ 17 42 45 ]
   FeatureHeight  0.2
   Octaves 2
}



Added after 7 minutes 28 seconds:
Of course details like the equatorial bulge on Pan and Atlas need a proper mesh. You would think after 13 years of Cassini imaging there would be meshes out for the minor moons of Saturn, but apparently nobody bothered to improve the ancient Voyager models.

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Post #6by LukeCEL » 22.12.2017, 01:22

CM1215 wrote:I am looking for methods to add detail to the minor moons to make them look more photo-realistic. Does anyone have any methods to do so?

I'm awful at modeling, but I have a few OBJ files that I made. I decided to keep them relatively low-resolution, but you can modify them if you want; I'm releasing these under public domain.

(Also, this has been done extensively in Celestia Origins, but you can use existing models and textures and mess around with the semimajor axes. For example, Kerberos has a dumbbell-like shape. So I used kleopatra.cmod for that.)
Attachments
calypso.obj.zip
(8.57 KiB) Downloaded 85 times
pan.obj.zip
(32.5 KiB) Downloaded 101 times
hydra.obj.zip
(8.67 KiB) Downloaded 81 times
atlas.obj.zip
(8.56 KiB) Downloaded 81 times

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Post #7by Art Blos » 22.12.2017, 08:59

LukeCEL wrote:I'm awful at modeling, but I have a few OBJ files that I made. I decided to keep them relatively low-resolution, but you can modify them if you want; I'm releasing these under public domain.
Thank you! We have a script that can improve the model. So we'll take them to a new release. :smile:
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Post #8by CM1215 » 22.12.2017, 12:01

LukeCEL, your models actually don't look too bad. Though I will probably end up waiting for Art Blos' improved version...I'm guessing they'll come out in the December 30th release.
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Post #9by Cham » 22.12.2017, 17:14

Hey! This give me the envy of returning to Celestia modeling! :eh:

I played a bit with the pan model, quickly adding polygons and smoothing the model. I applied some texture with normal mapping from someone here (I'm not sure who made these very nice textures. Probably John).

Here's the model for you to play with (it has a few tiny defects on the poles and some other rendering glitches, though) :
pan.cmod.zip
(550.51 KiB) Downloaded 112 times


The CMOD file is a pure text file, so it's very easy to change the two textures used by the model. Use your own. Many are already available on the forum.

Three previews :
Attachments
pan3.jpg
pan2.jpg
pan1.jpg
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Post #10by Askaniy » 22.12.2017, 18:02

Have you seen photos of Pan? :eh:
(Like this)
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Post #11by Cham » 22.12.2017, 18:15

I simply applied some arbitrary (but very cool looking) textures on the model, as a test. The model itself doesn't have the proper shape anyway.

You can easily change the textures used in the CMOD text file. We'll have to wait for someone to give away the proper textures for Pan, I guess.
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Post #12by CM1215 » 22.12.2017, 18:20

Cham wrote:Hey! This give me the envy of returning to Celestia modeling! :eh:
Well why don't you? It would be awesome to have you! :biggrin:

The model looks cool, but the texture you are using makes it look...fictitious.

Here is a view of the model used in Celestia with a more realistic texture:
PanNewInfo.PNG

FYI for those of you who are using this model, the orientation parameter [90 1 0 0] must be added to the SSC.
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LukeCEL
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Post #13by LukeCEL » 22.12.2017, 20:00

CM1215, that rendering looks really good!

Anyways, the model of Pan was made back when this was the most detailed picture of it. The new photos make Pan look different, almost popcorn-like. I guess that should be updated.

Also, what about Helene? There are high-resolution photos of that moon (see Wikipedia), but I can't seem to fit these together.

Added after 38 minutes 23 seconds:
Askaniy and CM1215, this model might be better.
Attachments
pan-improved.obj.zip
(8.79 KiB) Downloaded 95 times

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Post #14by Art Blos » 22.12.2017, 20:38

It's a pity the foreigners do not know what Pelmeni is. :wink:
the-homemade-ravioli-is-cooked-in-a-pan-with-the-boiling-water_nmpoad3tx__F0000.png
maxresdefault-2-1024x576.jpg

https://en.wikipedia.org/wiki/Pelmeni
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Post #15by MrSpace43 » 02.01.2018, 20:44

What about Amalthea?
Hi there! I'm MrSpace43, though I also go by Planetkid32. I've been into Astronomy since I was 5 or 6 and have started making planetary textures back in late 2016. I'm also a 3D animator who makes high quality animations in Cinema 4D. I'm even currently working on a fictional planetary system called the "Onis System."

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Post #16by LukeCEL » 02.01.2018, 22:06

The Celestia Motherlode has a more detailed model, which you can download here.

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Post #17by Pluto » 04.08.2020, 11:13

Pan be my favorite moon of any gas giant
Attachments
pan.zip
This is my 3d model but I need help texturing it!
(393.19 KiB) Downloaded 2 times


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