HOME | DD
Askaniy — Jupiter 2017 Texture Map (legacy)
by-nc-sa
#map #space #texture #jupiter #planet
Published: 2017-11-03 13:36:35 +0000 UTC; Views: 3045; Favourites: 7; Downloads: 101
Redirect to original
Description
Please note: this is an experimental and irrelevant texture. A reworked version of 2017 Jupiter map is here .I present the texture of Jupiter that uses data from Hubble (2017) and Juno (2016). Give credits to Snowfall-The-Cat and FarGetaNik . On this map, I tried to take into account the latest and reliable data about real colors and contrast of belts, poles and GRS. I based on the processing of Cassini photos by Ugarkovic (sample ), data from Juno (sample ) and processing from NASA (sample ). I think that the amateur color table of 2002 isn't a reliable source.
As a result, I probably received the most realistic color of Jupiter. It is not too white, it is not too yellow, it is not too contrasting. That's what it probably looks like.
Related content
Comments: 24
I used this texture as an addon for SpaceEngine here:
sta.sh/01ao958g509u
👍: 0 ⏩: 0
I used this texture here:
Rendering used from SpaceEngine.
👍: 0 ⏩: 1
Thanks for using!
New textures will be ready soon.
👍: 0 ⏩: 0
I found spectra for each of the giant planets: lasp.colorado.edu/~bagenal/372…
It is rather difficult to translate a spectrum into a visual color impression, but it worked quite well for Uranus and Neptune. I then tried to apply the same color balance on Björn Jónsson's Jupiter map, but the result is very strange:
👍: 0 ⏩: 1
Ok the result looks much more realistic if I apply the color on the zones instead of a global average:
👍: 0 ⏩: 1
This is definitely more realistic than before
I hope this source will be more reliable than the color table.
Это определённо более реалистично, чем раньше
Надеюсь, этот источник будет более надёжным, чем таблица цветов.
👍: 0 ⏩: 1
I've now matched the contrast to the Cassini image. What do you think is more accurate: the polar areas as dark as they are, or the gradient removed? Björn Johnsson stated that he removed the effects of lighting and atmosphere in his texture...
👍: 0 ⏩: 1
Based on the polar photos of Jupiter from Juno, I can assume that this is not an atmospheric effect.
In photos from different angles the region has a rounded shape and strict boundaries (exaples 1 , 2 ). This can not be repeated using atmospheric effects.
It is also known that during the arrival of Cassini, Saturn also had a blue north pole (3 ). It can be assumed that this is a common occurrence for these gas giants, but on Saturn, unlike Jupiter, it has a periodic character due to the axial tilt.
На основе полярных фотографий Юпитера от «Юноны», я могу предположить, что это не является атмосферным эффектом.
На фотографиях с разных ракурсов регион имеет округлую форму и строгие границы (примеры 1 , 2 ). Такое нельзя повторить используя атмосферные эффекты.
Также известно, что во время прилёта Кассини, Сатурн также имел синий северный полюс (3 ). Можно предположить, что это обычное явление для этих газовых гигантов, но у Сатурна, в отличие от Юпитера, оно имеет периодический характер из-за наклона оси.
👍: 0 ⏩: 1
It is convincing that it's a real thing, but the magnitude of the gradient in the left texture was way to high to look natural.
By now, I processed the texture in a way the gradient is still there, but not as intense at it appears on my left texture.
👍: 0 ⏩: 1
Is this your new Jupiter texture?
celestia.space/images/gallery/…
👍: 0 ⏩: 1
Yes, but actually it was the version with the gradient. It looks slightly different now.
👍: 0 ⏩: 1
The gradient was in photos from Cassini
👍: 0 ⏩: 1
Put simply, this is my new Jupiter texture:
I disliked the amplitude of the gradient, so I changed it to something that looks more natural to me. It makes it impossible to balance brightness and color correctly, so I don't claim it's 100% true to reality.
👍: 0 ⏩: 1
Looks good
In the true color photos, the belts and GRS look more saturated orange. What do you think?
👍: 0 ⏩: 1
Thanks 
👍: 0 ⏩: 1
I tried to process the texture from "Cassini" and bring it closer to processing Ugarkovic (more than a month ago).
It turned out quite similar:
👍: 0 ⏩: 1
nice, only the gradient is that much more obvious compared to your 2017 texture. I think the hues should be somewhere between our 2 versions.
👍: 0 ⏩: 1
Yes, it is.
I found that using the parameters "Color" and "BlendTexture" it is possible to slightly change the hue without correcting the texture itself:
This method will be used in the Celestia Origin.
👍: 0 ⏩: 1
Yes I know. But I'd rather have a texture that is properly colored to begin with. Since Celestia multiplys the texture with the defined color, the surface becomes darker. I avoid it on color textures and only use it on greyscale textures and minor bodies where no real textures are avaliable.
👍: 0 ⏩: 1
I completely agree. But this is the fastest option to adjust the texture, because the new version of the collection will be released soon. When updating textures, the need for the method disappears.
👍: 0 ⏩: 0
Ok definately interesting, it looks fairly realistic at first glance. Maybe I should show you the problems I had to face when making my textures.
The raw data, like this red filter map certainly is contrast enhanced, so I had to take amateur images to fit the contrast for each color channel. This of course is very difficult. Did you match the color channels individually as well?
Absolute color reference. The image from Ugarkovic certainly is a good reference when it comes to relative colors, but how do you know the intensities of each color channel? That's why I used the site by Don Davis for the lack of better reference. Ideally you want a spectrum of Jupiter that accounts for atmosphereric effects like haze and reighley scattering and the intensity of incident light, but then you still don't know how that affects the different belts and zones that are ever changing.
Atmopheric effects. Haze and Reighleigh scattering are factors that are variable with phase angle and wheter you are looking at the edge or the center. I am still not sure how intense the blue tint around the polar areas should be, because this is partially caused by Reighleigh scattering.
That's why I can't really wrap my head around this vastly different result and I don't want to throgh away the work I have done so far...
Also I can't help to notice that you enhanced the color of the GRS
I quickly did a RGB filter composite from raw Cassini images, and this is how Jupiter looks completely unprocessed: Rgb-compose . But still, since you don't know the filter and visual color response this doesn't tell you the actual color of Jupiter.
👍: 0 ⏩: 2
Now I will answer in more detail.
I didn't use color channel processing here, because I know about the difficulties of their search. However, later I plan to do it. I know one most accurate source
On this texture, I did not take into account the additional haze and atmospheric effects. Therefore, it may not approach your Jupiter atmosphere for Celestia. I tried to make it so that the results of the effects overlap the texture. Thus, it can be applied even to the sphere and get a result close to the truth.
Thanks, the GRS itself took the right color along with the rest of the texture. I didn't change it separately
Сейчас отвечу более подробно.
Я здесь не использовал обработку по цветовым каналам, так как знаю о сложностях их поиска. Однако, позже я планирую этим заняться. И я знаю один наиболее точный источник
На этой текстуре я не учитывал дополнительную дымку и атмосферные эффекты. Поэтому, она может не подойти к вашей атмосфере Юпитера для Celestia. Я постарался сделать так, что бы результаты эффектов накладывались на текстуру. Таким образом, её можно применить даже ко сфере и получить результат, близкий к настоящему.
Спасибо, БКП сам принял правильный цвет вместе с остальной текстурой. Отдельно его я не изменял
👍: 0 ⏩: 0
Thanks for the comments! They will help me in the future.
Спасибо за замечания! Они помогут мне в будущем.
👍: 0 ⏩: 0