Making the Earth

Get feedback from others on your works in progress
User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Making the Earth

Post by Onizuka » Mon Aug 04, 2014 10:52 am

Hi,

I'm trying to make the Earth, and why not some other planets...

But as you can see on the render, I have a problem on the circumferency of the sphere, where the light of the sun ends, it makes appear the triangles of the 3D sphere, and there is this hapening whatever the inclination of sun. Does any one have an idea to resolve this ?

Its made of one sphere with the Earth texture on it, and a bigger sphere with a PNG image of the clouds.
The Earth texture has a phong material and some bump mapping, And the cloud texture is a diffuse with some bump mapping too.

Everything is at real scale...

Any idea please ?
Attachments
bvy 1776.jpg
I also tried to add a third sphere with the fog material from the material database, but if it solve the problem, it blur the whole earth...
bvy 1780.jpg
bvy 1779.jpg
And here the same view with only the sun, you can see the triangles of the sphere...
bvy 1778.jpg
first with sky light and sun, no problem, but its not really accurate for an in space image

User avatar
Oscar J
1st Place Winner
Posts: 2169
Joined: Sat Mar 31, 2012 3:47 am
Location: Gothenburg, Sweden
3D Software: Blender

Re: Making the Earth

Post by Oscar J » Mon Aug 04, 2014 9:02 pm

Why not make the displacement of the planet more high res?

User avatar
bubs
2nd Place Winner
Posts: 614
Joined: Fri Jul 22, 2011 8:46 pm
Location: UK

Re: Making the Earth

Post by bubs » Mon Aug 04, 2014 10:17 pm

Looks like a SketchUp smoothing issue to me...

User avatar
Oscar J
1st Place Winner
Posts: 2169
Joined: Sat Mar 31, 2012 3:47 am
Location: Gothenburg, Sweden
3D Software: Blender

Re: Making the Earth

Post by Oscar J » Mon Aug 04, 2014 10:20 pm

No, no, Indigo always does that with sharp sunlight coming in to a low res mesh at a low angle.

User avatar
bubs
2nd Place Winner
Posts: 614
Joined: Fri Jul 22, 2011 8:46 pm
Location: UK

Re: Making the Earth

Post by bubs » Mon Aug 04, 2014 10:25 pm

Ok, can't say I ever tried something like this.

User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Re: Making the Earth

Post by Onizuka » Mon Aug 04, 2014 10:54 pm

Thanks for the answers !
Well I guess its not the geometry because its a 20000 poly components... but why not...

The resolution of the map is 4k i think something like 8000*4000 pixels. The bump map is based on the texture so has the same resolution

User avatar
Zom-B
1st Place 100
Posts: 4641
Joined: Tue Jul 04, 2006 4:18 pm
Location: ´'`\_(ò_Ó)_/´'`
Contact:

Re: Making the Earth

Post by Zom-B » Mon Aug 04, 2014 11:23 pm

You may check out this here if you go for some earth atmosphere simulation:
http://www.indigorenderer.com/forum/vie ... 72#p127472

Indigo can do some nice stuff here: http://www.indigorenderer.com/images/at ... simulation
polygonmanufaktur.de

User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Re: Making the Earth

Post by Onizuka » Mon Aug 04, 2014 11:52 pm

Thanks
I've seen this pages, but I dont see where are the explanations to create this earth atmosphere and its blue halo

User avatar
Zom-B
1st Place 100
Posts: 4641
Joined: Tue Jul 04, 2006 4:18 pm
Location: ´'`\_(ò_Ó)_/´'`
Contact:

Re: Making the Earth

Post by Zom-B » Tue Aug 05, 2014 12:14 am

Onizuka wrote:I've seen this pages, but I dont see where are the explanations to create this earth atmosphere and its blue halo
There is some download file attached in the Forum post...
polygonmanufaktur.de

User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Re: Making the Earth

Post by Onizuka » Tue Aug 05, 2014 12:22 am

Oh okay well i must have missed it on my mobile... I will go check again ^^

User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Re: Making the Earth

Post by Onizuka » Tue Aug 05, 2014 12:40 am

I've seen, but how can I use the atmo material of the pig file scene, into my own scene ? can't I save the atmo material as a material, to import it in my scene ? How do I do please ?

"Edit" Ok I am sorry I've just found how to save materials

User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Re: Making the Earth

Post by Onizuka » Tue Aug 05, 2014 1:31 am

Well that's what I got whith this atmosphere material ^^
lol

Any suggestions ?
Attachments
bvy 1788.jpg
And here I changed the 4K earth texture to the same in 10k... but we still see the triangles of the globe...

Here I removed the atmosphere wich we can see just behind the earth, her reflecting on the atmosphere, and very far, the moon...
bvy 1787.jpg
I got only a half of the atmosphere I don't know why

User avatar
Zom-B
1st Place 100
Posts: 4641
Joined: Tue Jul 04, 2006 4:18 pm
Location: ´'`\_(ò_Ó)_/´'`
Contact:

Re: Making the Earth

Post by Zom-B » Tue Aug 05, 2014 1:48 am

Onizuka wrote:Any suggestions ?
Yes, scale is VERY important here!
If your earth sphere is only 200cm big, the atmosphere will be quite... thin ^^
polygonmanufaktur.de

User avatar
CTZn
Posts: 7240
Joined: Thu Nov 16, 2006 4:34 pm
Location: Paris, France

Re: Making the Earth

Post by CTZn » Tue Aug 05, 2014 2:11 am

the shadow terminator issue here is best adressed by using sphere primitives for celestial bodies. If you were to need the use of displacement, then the sphere mesh should be subdivided 3 to 5 times as per normal.

edit: also on clouds I could not make a spherical projection up, making my model work at poles only.
obsolete asset

User avatar
Onizuka
Posts: 111
Joined: Thu Jun 19, 2014 3:48 am
Location: Earth

Re: Making the Earth

Post by Onizuka » Tue Aug 05, 2014 2:24 am

Well everything is at real scale, the Earth is 6378137 meters large for a half diameter (dont know the word in English), and the clouds are at 10000meters high from the surface of the Earth.

But in fact I didn't scale correctly the atmosphere... but I m not sure how big I should set it up to be correct in real scale, since the real atmosphere is not clerly delimitated by a physical sphere

Post Reply
55 posts

Who is online

Users browsing this forum: No registered users and 1 guest