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 Post subject: saturn
PostPosted: Tue, 25-08-15, 5:44 GMT 
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i think most of us are using the old th_Saturn texture and that is in need of updating

so while i am ingesting Cassini Rev:203 mapping sequence into isis3
Image

a concept 100% synthetic idea
Image

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 Post subject: Re: saturn
PostPosted: Tue, 25-08-15, 8:00 GMT 
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Good idea, John, to have another go at Saturn...

For now, I am using a 2k Saturn texture for celestia.Sci that I made some years ago, when the blue Northern color became known via Cassini.

2k Saturn texture (for download):
Attachment:
saturn-fri.png
saturn-fri.png [ 1.4 MiB | Viewed 1776 times ]


I also made my own 4k Saturn rings from the quite recent hires data by Cassini.

Here is a global view
[Click on the image and then on the browser's full-screen key ( = F11 for FF) for a natural 1920x1200 display]
Attachment:
saturn_Sci.jpg
saturn_Sci.jpg [ 208.59 KiB | Viewed 1776 times ]


and here a detailed view of the high ring resolution:

[Click on the image and then on the browser's full-screen key ( = F11 for FF) for a natural 1920x1200 display]
Attachment:
satring_hires.jpg
satring_hires.jpg [ 222.51 KiB | Viewed 1770 times ]


Yet, notably the rings need further work, to reproduce their differing albedo, when looking from above and below the ringplane (!), respectively. A further independent requirement is to implement the correct transparency of the ring as function of the radial distance from Saturn's cloudy surface. In my case, the transparency is OK, as well as the one-sided albedo (top view). The strongly varying transparency profile of the Saturn ring was derived from hires stellar transit data taken from Earth!

Fridger

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 Post subject: Re: saturn
PostPosted: Wed, 26-08-15, 5:39 GMT 
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not to bad for a first run
--FILTER_NAME = ("CL1","GRN")
Image
polar stereo
Image
blended with the th_Saturn map and recolored
-- 4k map--
Image

the image list
all of these are "FILTER_NAME = ("CL1","GRN")"
Code:
W1775154914_1.IMG
W1775160202_1.IMG
W1775165490_1.IMG
W1775170778_1.IMG
W1775176066_1.IMG
W1775181354_1.IMG
W1775184316_1.IMG

and recolored partly based on PIA12513.tif

screenshots

Image Image Image Image

this is the green filter ( aprox. 570 NM )
now on to the CB2 set ( aprox. 750 NM ) and MT2 ( aprox . 727 NM )

there are NO red and blue for this set

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 Post subject: Re: saturn
PostPosted: Wed, 30-08-17, 18:14 GMT 
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John, can you post a download link for the high-resolution Saturn texture map that is in those Celestia screenshots?

Apparently, the 4k texture that you have already uploaded and the texture used in the screenshots are not the same thing.

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 Post subject: Re: saturn
PostPosted: Wed, 30-08-17, 19:03 GMT 
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the thumb nail links to a FULL sizer 4096x2048 image
but there is a small version displayed first but if you click on it it shows the full size
or if you just r-click and select save as
it will be a 4k image

and that 6.3 meg "jvv.saturn2.png" on imagbox IS the same map i used and do use

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Last edited by John Van Vliet on Wed, 30-08-17, 19:09 GMT, edited 1 time in total.

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 Post subject: Re: saturn
PostPosted: Wed, 30-08-17, 19:08 GMT 
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Well...When I use it on Celestia, it doesn't look the same as the screenshot's you took...it looks lower resolution.

Here is a screenshot that I took:
Attachment:
Saturn Texture.PNG
Saturn Texture.PNG [ 1.57 MiB | Viewed 479 times ]

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 Post subject: Re: saturn
PostPosted: Wed, 30-08-17, 19:19 GMT 
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i do have a copy that was not de-noised
https://drive.google.com/file/d/0B6ZYAd ... sp=sharing

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 Post subject: Re: saturn
PostPosted: Wed, 30-08-17, 19:32 GMT 
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I don't think that even this is the right texture. What texture did you use in this screenshot you took?
Attachment:
sat3.png
sat3.png [ 977.84 KiB | Viewed 476 times ]

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