Green Mars: update on page 6

Started by Mahnmut, September 10, 2012, 10:02:30 AM

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Mahnmut

That´s the best actual Mars data  I have (bumpmap and surface colour).
great for planetary shots.


up close its less great:

Reference: the foreground sphere is 10 m in diameter, the background one 10km, roughly Mount Everest size.

And now, the same view terraformed:

Not perfect , but I think I am getting there.
Any C&C?
Places you´d like to see? This is a tangential view of the Valles Marineris btw.
Best Regards,
J

Wurby

Life's hard. Life's harder if you're stupid.

masonspappy

So, "Green Mars" is what this would be if Mars suddenly aquired an atmosphere?
- Cam

Mahnmut

#3
Thanks Wurby!
All you need for the first image are these two maps:

http://decibel.fi.muni.cz/models/cinema2008/xstukovs/2/marsbump.jpg

http://solarviews.com/raw/mars/marscyl1l.jpg

Although the bumpmap I use is bigger(16k), I got it from the celestia motherlode but it´s not there anymore. the one above is the best I could find now, good enough for planetary views.
The green one contains a lot of detailwork, about 50 layers. Not all visible in this shot, but finally it looks at least decent up close and from space. I am going to explore my mars a bit now.
And, as always, art can´t outshine nature, behold the real Mars:

http://www.nasa.gov/mission_pages/MRO/multimedia/pia15283.html

@ Masonspappy:
mostly, yes, that´s what I mean by Green Mars. It´s also the title of the second book in a great trilogy about the terraformation of Mars.
In my image I use the best (that is highest resolution) Data I can get about Mars´ actual topology and use TG and my imagination to visualize what a living Mars with earthlike atmo, oceans and Plants could look like.

My best regards,
J

TheBadger

#4
this is a cool project! Maybe some elements of mans presence?

By the way Jan, did you see this short film Calico found http://vimeo.com/44644178 ?
It has been eaten.

nethskie

superb project! (too bad i haven't learned using bump maps in terragen 2 yet for a whole planet i don't know how to do it i can only do atmosphere image maps) congrats on this good luck with the project looking forward to see the terraformed version!

Mahnmut

#6
Thanks, Badger.
I think it´s to early for mans presence, I haven´t explored the beauty of the land yet.
When I browsed through the Nasa "hirise" image galllery yesterday (see link above) I didn´t even lke the idea of terraforming so much because Mars as it is is sooo beautiful!
Great shortmovie anyway, thanks for that.

Thanks nethskie.
I don´t know if my way is the optimal, but I use bumpmaps as follows:
I put a Surfacelayer in the terrain group (before compute terrain) and use an image map shader with you bumpmap as its displacement funktion. My Mars has roughly realistic proportions with a radius of 3.4e006 m and an displacement amplitude of 40000 m
The image has to be projected spherically, with its center at 0/0/0 if you enable "rotate texture with planet" and "translate texture with planet" in the planets settings. this way you can move your planet around, but it gets tricky with additional procedural landscape.
f you switch of the two texture options put your imagemaps center at the planets center and  your map won´t move with the planet, but surface layers act more predictable. So the latter is better for closeup shots, for rotating planets use the first option. Thats as much as I learned recently.

And here some more impression of the green Mars:

http://farm9.staticflickr.com/8175/7974675769_b07a1138a1_c.jpg
Not so green in a high valley of noctis labyrinthus
http://farm9.staticflickr.com/8454/7974675980_ab632197da_c.jpg
a little further down, Thanks to dandelOs planetary gras shader!

http://farm9.staticflickr.com/8179/7974675796_ae8c98c15c_c.jpg
still in noctis, no new settings for this shot, that´s how it was when I first came there.


Low tide in the argyre-sea. Shadows in Atmosphere would have been nice, but that will take days to render.


you may know these

Argyre sea and Phobos with its old surface, back then I didn´t know better. For the new Phobos, look here:
http://www.planetside.co.uk/forums/index.php?topic=15069.0

Best Regards,
J

nethskie

wow mate thanks for some tips gonna try this soon!. wow looking really good! just add some north and south pole and it will be even more perfect!

Mahnmut

Oh, I got poles. they just need some more makeup before they are ready for closeup shots.
first thumb:
http://www.planetside.co.uk/forums/index.php?topic=15036

Best regards,
J

masonspappy

I'm wondering - Mars is smaller and so would capture a thinner atmosphere than earth, so it would be a deeper blue. Would also imply that the most habital parts of the planet would be in the deep valleys and ice/snow would occur at fairly low elevations. 

Mahnmut

@Masonspappy:
yes, thats more or less what I try to build here :)
You may have noticed the stars in the daylight sky.
Concerning atmosphere thickness: there are other factors than mass, Venus for example has an escape velocity that is about 92% of earths but an atmosphere 50 times thicker on average. The moon Titan got only 24% of the e.v. but an Atmo about 1.4 times thicker than earth.
Mars´ escape velocity is about 45% of Earths, its real Atmosphere has about 0.63% of the density of ours.
My Mars´atmosphere also has a lot of pinkish haze, although on a living Mars most of the dust would be bound to the ground.
A lot of my high altitudes is more or less original Mars-colour.
As for snow, you need two things, cold and humidity. Thats why my high altitudes got no snow. And my lowlands got neither because I decided that my fictional Mars is warmer than that in the tropical and moderate lowlands. But I will keep that in mind when filling in polar detail, until now I´ve only used maps of the real poles.
Thanks for your interest!
J

Mahnmut

Because you asked so nicely for poles ;
And because I spent a rainy day with my new Deep version :)

Northpole,I used the structure of the real marspole, unrealistic for a wet Mars, but to beautiful to discard.


southpole


Some clouds


Jo Kariboo

Yes! A very nice project!!! I very like the first and the five last render.

masonspappy

The last image (Mars with a thin bluish atmosphere and clouds) is my favorite