Deimos

[john Van Vliet]

edit
my oops i just noticed the
MeshCenter [ -0.299 -0.284 0.369 ]
in the solorsys.ssc

[t00fri]

Nice, but what about the references?

Where is the model from and what data are used for the texture? Is it strictly from scientific data or did you also involve some "eyeball" work?

Fridger

[john Van Vliet]

the mesh is inferred m2deimos.tab ( ascii2isis) with a bunch of editing to bump the image to 4k, and add detail . Then drop it down to 360x178 to import to Blender .Then some blender " magic "
The new vids are with the cmod recentred after editing the " MeshCenter " to [ 0.00 -0.10 0.10 ]
two fresh vids
" with the texture map "
http://www.youtube.com/watch?v=Ob5d9XTdjfU

" and without the texture "
http://www.youtube.com/watch?v=g7A4RaaOzho

[t00fri]

the mesh is inferred m2deimos.tab ( ascii2isis) with a bunch of editing to bump the image to 4k, and add detail . Then drop it down to 360x178 to import to Blender .Then some blender " magic "
The new vids are with the cmod recentred after editing the " MeshCenter " to [ 0.00 -0.10 0.10 ]
two fresh vids
" with the texture map "
http://www.youtube.com/watch?v=Ob5d9XTdjfU

" and without the texture "
http://www.youtube.com/watch?v=g7A4RaaOzho

John,

I understand your procedure, but still what where the scientific imputs?

Where are the model "details" BEYOND m2deimos.tab from? Did you do those by "eyeball" or not? Where is the texture imaging from? Was it just part of isis3 and projected to simple cylindrical within isis3? Was there some additional "fiddling" to achieve matching between the model and the texture/location data?

Fridger

[john Van Vliet]

what you would call eyeball
started with this

then through image enhancing using the map and gmic ( the new greycstoration) bumped the size up and added some details .Then after remapping it too two overlapping polar projections .I hand dodged/burned the two maps for the craters and hi-spots.
the north pole

finally ending up with this
the texture map i am using is the one Phil Stooke did but cleaned up
http://www.psi.edu/pds/asteroid/EAR_A_3 ... V1_0/maps/

a 1k copy

this i imported into Blender, after reducing it to 360x178 ,then sculpted it .

[t00fri]

John,

thanks for filling in the details of your procedure.
So you shaped the model by hand (or "eyeball") around the given m2deimos.tab data, using Phil Stooke's texture as a guide?

Fridger

[john Van Vliet]

i just ftp'ed the files to the celestia motherload so in a few days it should be up and ready for download
some screen shots with the 27 meg high res cmod

[BobHegwood]

Hey, thanks a lot there John.
Much appreciated by the Brain-Dead.

[Hungry4info]

Wow nice. I didn't know Deimos was that well known.

[john Van Vliet]

Wow nice. I didn't know Deimos was that well known.

the map image is ,for the most part, the same as the celestia default just colorized
the cmod is inferred from photos

[Hungry4info]

The models are on the motherlode now. Downloaded them as quick as I could.

The High_Poly one seems to be displaying some interesting anomalies. The texture is Celestia's default, so the colour is as expected. I'm running 1.6.0. In my STC (posted below), I have applied a LunarLambart to Deimos (and anything without a significant atmosphere, to be honest) to make it look more appealing. It looks like the wrong side of Deimos is being illuminated.

[Hungry4info]

Another picture, clearly showing that parts of Deimos are illuminated that are not facing the sun.

[john Van Vliet]

The models are on the motherlode now

that is good to know , this is the first i heard of it .

odd i will look into it . they look fine on my computer

------- edit ---------
it dose look to be off -- except for the time that i made the screenshots
they fell into a slot in witch the lighting was correct

[Hungry4info]

I am able to reproduce this "bug" with both the low_poly model, and without a Lambert.

I am assuming that the issue is on my side.

Code: Select all

"Deimos:Mars II" "Sol/Mars"
{
   Mesh "Deimos_LowPoloy.cmod"
   Texture "deimos.*"
   Radius 7.9 # maximum semi-axis
   MeshCenter [ -0.299 -0.284 0.369 ]

   EllipticalOrbit
   {
   Period            1.262441
   SemiMajorAxis     23463.2
   Eccentricity      0.00033
   Inclination       1.793
   AscendingNode    25.229
   ArgOfPericenter 208.213
   MeanAnomaly     344.128
   }

   UniformRotation
   {
   Inclination        0.9
   AscendingNode   183.0
   MeridianAngle      214.7
   }

   #LunarLambert 1.0 # To make it more photorealistic.
   Albedo         0.08
}

[john Van Vliet]

no the issue is on me
the normals for the cmod look to be off from the quick look i took
Later tonight i will reexport it from blender . i could have sworn that i rotated the normal very early on .Guess not or rotated it the wrong way.