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QuadSphere Map
show user profile  tedchirvasiu
Hello!What is the best way to unwrap a quad sphere(a cube with Spherify modifier on it) in 3ds max?
Please help me :(
read 1488 times
6/3/2011 1:02:01 PM (last edit: 6/3/2011 1:02:01 PM)
show user profile  br0t
uh...UVW map Spherical ^^?
What kind of object ist that quadsphere, what texture will it get?

never get low & slow & out of ideas

read 1480 times
6/3/2011 1:20:19 PM (last edit: 6/3/2011 1:20:19 PM)
show user profile  tedchirvasiu
Nope.UVW Map - Spherical will give a ton of distorsion :(
I need a very clean unwraping.
It must get any kind of texture (The unwraped earth texture,for instance) and apply it propertly on the sphere,with no visible stretching,seams or distorsion
Something like :

And this is a quad sphere :,r:4,s:0&tx=132&ty=96&biw=1173&bih=806

//it is baisically a cube transformed into a sphere :

Please help me :(
read 1477 times
6/3/2011 1:22:38 PM (last edit: 6/3/2011 1:33:26 PM)
show user profile  Sylverstalker
Is it even possible to unwrap a sphere with 0 distortion?

EDIT because I'm pretty sure every map is actually distorted because you cannot have a nice square representation of a sphere. You would have to make the texture specifically for the sphere as far as i can see....

EDIT 2: like this

read 1464 times
6/3/2011 1:37:37 PM (last edit: 6/3/2011 1:43:08 PM)
show user profile  tedchirvasiu
I think so.I saw many out there,but i don't know how they did it :\
And i didn't said that i really want 0 distortion,but as less as possible
read 1461 times
6/3/2011 1:40:13 PM (last edit: 6/3/2011 1:40:13 PM)
show user profile  Sylverstalker
Oh you replied, check my edit :)

read 1458 times
6/3/2011 1:43:54 PM (last edit: 6/3/2011 1:43:54 PM)
show user profile  tedchirvasiu
Oh,yeah,i have read that article on wiki but isn't that a normal sphere?Mine is a quad sphere
read 1454 times
6/3/2011 1:47:33 PM (last edit: 6/3/2011 1:47:33 PM)
show user profile  Sylverstalker
Why did you choose a quad sphere? Is a quad sphere not just a slightly less accurate representation of a sphere made from quads and tri's with the added problem of being more difficult to accurately unwrap? I'm no unwrapping expert but i think it would be harder on a quad sphere.

read 1449 times
6/3/2011 1:51:23 PM (last edit: 6/3/2011 1:51:23 PM)
show user profile  tedchirvasiu
I need it :(
I want to achive something like :
And even if i used a normal sphere i would get the same distortion on the top
read 1446 times
6/3/2011 1:54:55 PM (last edit: 6/3/2011 1:54:55 PM)
show user profile  Sylverstalker
So is that video showing an increase in polygon resolution based on view distance?

If you are any good at digital painting you could either custom make the texture or maybe even try making the texture on a program like zbrush by working directly onto the sphere.

With a normal sphere the best way I can think to map it is by splitting it into 3 sections you could tr splitting the quad sphere into sections and trying to make the texture seamless.

what do you want to do with the final product?

read 1443 times
6/3/2011 2:02:52 PM (last edit: 6/3/2011 2:02:52 PM)
show user profile  tedchirvasiu
Yes,but it isn't that simple.The height map will be based on a randomly generated perlin noise map inside unity3d.So that's why i needed the sphere unwrapped on the whole uvw square.

I want to create a planetary landing
read 1440 times
6/3/2011 2:05:15 PM (last edit: 6/3/2011 2:08:04 PM)
show user profile  Sylverstalker
I don't think you will get it to work without distortion. Wait until someone else with a little more experience here replies before giving up hope.

read 1429 times
6/3/2011 2:11:31 PM (last edit: 6/3/2011 2:11:31 PM)
show user profile  tedchirvasiu
There must be a way at least to fake it when i generate the noise map
Anyone? :(
read 1426 times
6/3/2011 2:13:36 PM (last edit: 6/3/2011 6:58:05 PM)
show user profile  Dave
Seams V Distortion.

More seams = less distortion.
More distortion = less seams.

So... pick one!

Have you considered mapping it like you would a box? (in a sort've T shape?) If it's a box before you make it a sphere, then look at it like mapping a box. This should simplify things for you a great deal.

"I flew over Egypt once"

read 1383 times
6/3/2011 8:56:47 PM (last edit: 6/3/2011 8:56:47 PM)
show user profile  tedchirvasiu
I considdered that option but i would get stretching and seams aswell
read 1369 times
6/3/2011 9:36:13 PM (last edit: 6/3/2011 9:36:13 PM)
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