Celestia Forums

Look at this:
http://img392.imageshack.us/my.php?imag ... tuste2.jpg
This happens with the 3 last render paths: Open GL Vertex Program,Open GL Vertex program/Nvidia Combiners and Open GL 2.0

My ssc is the following:
Texture "iapetus.*"
SpecularTexture "iapetus-spec.*"
SpecularColor [0.32 0.32 0.32]
SpecularPower 9.5

What happened?

Well, I think this is easy. I exactly have the same. You're using (like me !) two incompatible files, one as a base texture, and another one for specular map. The specular map isn't properly aligned for the base texture. I didn't had time to check both textures, but I'm pretty sure that's the explication.

danielj wrote:Look at this:
http://img392.imageshack.us/my.php?imag ... tuste2.jpg
This happens with the 3 last render paths: Open GL Vertex Program,Open GL Vertex program/Nvidia Combiners and Open GL 2.0

My ssc is the following:
Texture "iapetus.*"
SpecularTexture "iapetus-spec.*"
SpecularColor [0.32 0.32 0.32]
SpecularPower 9.5

What happened?

Daniel,

think ONE MOMENT!

How can you expect anyone to help you, if you do NOT specify precisely WHICH iapetus base texture and iapetus spec texture you were using!! Precise sources, please. It's surely not my default textures from the distribution, since I have checked those carefully.

Obviously the result depends on the textures used. So if you do not specify PRECISELY which textures you used, you are vasting our and your time.

Bye Fridger

The textures are yours.The base texture is 8k(see this thread http://www.celestiaproject.net/forum/viewtopic ... ht=iapetus).I get the texture of January 25,2006 and the specmap is 2k.The specmap is that included in the zip file of February 19,2005.Maybe THIS can be more self explained:

iapetus.ssc:

February 16, 2005

My new precision 2k Iapetus texture incorporates the following raw
textures:

1) Lowres from Voyager:

http://photojournal.jpl.nasa.gov/jpeg/PIA00348.jpg
etc...

2) Hires from Cassini:

http://photojournal.jpl.nasa.gov/jpeg/PIA06166.jpg

3) Lores from Cassini:

http://photojournal.jpl.nasa.gov/catalog/PIA06145
http://saturn.jpl.nasa.gov/multimedia/i ... etails.cfm

3) For the coloration, I used this recent Cassini 'natural color'
image as a template for the computer color mapping:

http://photojournal.jpl.nasa.gov/jpeg/PIA06167.jpg


I made the cylindrical projections of the respective photos with Matthew
Arcus 'mmps' software,

http://www.users.globalnet.co.uk/~arcus/mmps/

and took great care of their correct alignment. Special care was
devoted to avoiding non-linear distortions during the mapping process.

All texture borders are smoothed such that the texture makes a nice, homogenous
impression. Finally, I also created a specular texture and a bump-map
texture. Since from the spectral analysis, we know that the white icy
stuff is largely water-ice with a reflectivity of >60%, a spec texture
is really in place!

The generation of the bump-map followed my long-standing know-how
including smoothing the gray-scale texture with a selective gaussian
blur etc...

danielj wrote:The textures are yours.The base texture is 8k(see this thread http://www.celestiaproject.net/forum/viewtopic ... ht=iapetus).I get the texture of January 25,2006 and the specmap is 2k.The specmap is that included in the zip file of February 19,2005.
...

Daniel,

you were combining two of my Iapetus textures, the release date of which differed by about 1 year!.

The main new input in January 2006 came from the official release of cylindical Iapetus maps by the Cyclops team! These included some coordinate shift, whence my 2005 spec map and the later 8k base map from January 2006 do not match anymore!

It's not my fault, if Cyclops changes the coordinates .... That's life and you should always watch out, NOT to combine incompatible releases. Don't forget that ONLY my 2k and 4k release in Celestia 1.4.1 so far is 'official'. The rest is "research in progress". After discussions with Chris, I have not published spec and normalmaps for my official 2006 Iapetus distribution.

Bye Fridger

Fridger,

can you share your latest hires texture set (including spec and bumps) here, in an "unofficial" way ? I would especially appreciate a new spec map to replace the old one.