Nice technique! Though I would say that it looks more like an orange tennis
ball than a basketball. I would make the black stripes much smaller for a
basketball.

"Alan Holding" <man### [at] lineonenet> wrote in message
news:3b4d11fb@news.povray.org...
> Hello, all.
>
> This is a follow up to my post in povray.general.
>
> I'm doing a basketball based image at the moment, and decided to make the
> basketball using an isosurface.  However, coming up with a suitable
> image/bump map which could be spherically mapped onto the isosurface
proved
> a real pain.  The maps I created in Paint Shop Pro never turned out right.
> So, after a think, I decided to create the image/bump map using MegaPOV's
> spherical camera - what better way to create a spherical map?
>
> Please see the attached pic for what I'm referring to in this bit.
>
> I had to imagine myself in the middle of a basketball (as you do).  What
> would cause the pattern that I'd see?  Well, two torii going around me
> should take care of the 'up and down' and 'left to right' lines, but the
> awkward squiggly bit would take more work...
>
> So, I created a patch model in Hamapatch (1) to simulate the squiggle.
This
> was simply two points which were spun with the lathe feature and then
> transformed and rotated about until I ended up with the final model.
>
> Next, I set up a scene in MegaPOV (2) with a spherical camera - the yellow
> dot - surrounded by the objects needed to create the map, the two torii
and
> the Hamapatch model.  There was no lights in the scene and the textures
used
> for the objects was black with an ambient of zero and no diffuse.  (The
> funky colours in (2) are just there to show what's what.)  Then I rendered
> the map (3), and finally placed it onto the isosurface basketball object
as
> both an image map and a bump map in the isosurface's function (with a bit
of
> noise3d thrown in).  The resulting object is shown in (4).
>
> What d'ya think?
>
> I'll post the image it's going in when it's completed.
>
> Bye,
> Alan.
>
> --
> ICQ 114025688
> Black & White?
>
>
>
>
>
>
>

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