Changing the mapping uvs
 

How do I change the way the uv coordenates of an object are mapped? Example: planar mapping a sphere... I've tried creating a plane and choosing it as reference for texture coordenates but it did nothing.

Its best to sperical map a sphere, the UV map node has yellow squares as edit points that you can pull to adjust the size and squeeze of the image.

Why would I want to do that? Maya does it automatically. When I said planar it's not only because I really want it that way but also because it's not the default procedure...

what are you trying to do? Why do you need it planared like that? Maybe then I(we) may understand your need better to give a better answer...

Let me unveil a little of my experiment:
I am trying to do an outside scene. Part of it is a sky hemisphere: a nurbs objects with blue/white noise. I want this shader to be applied from the top of the hemisphere. I'm focusing on getting a nice atmosphere without using stuff like the new 4.5 capabilities, which can do amazing clouds but are slow as hell too.

Here you can see the actual mapping from outside (you aren't supposed to render from here later, of course lol.

This idea is a remake of an old scene (2 years ago or more, can't precise) I made in max. Here you can see the original.

In that case, you probably want to use a projection map of your texture, not necessarily manipulate the object's UVs.

Use the envSky shader on an image plane as a texture and you can get a nice sky :)

You won't have to worry about UV's either ;)

Darkon

mtmckinley: How do I use a projection map then?

Darkon: you're missing the point. I want to know how to do it myself :)

When you click the map button for color, choose Projection instead of normal when picking your file.