In article <3984314f$1@news.povray.org>, "Chris S." 
<chr### [at] bluelectrodecom> wrote:

> Wow, my bubbles are really getting trashed!  However, I agree with 
> previous comments that they should be whiter and more organically 
> shaped...but therein lies the problem.  The bubbles themselves are 
> clear and would be invisible if not for a .25 reflective finish. 

Ah, here is one problem. Use angle-dependant reflection, some 
refraction(ior 0.67? Or just ior 1, and difference the bubbles away from 
your water object, which should be around ior 1.33), and very small 
specular highlights.


> I suppose I could try a blob macro on the bubbles,

For the largest bubbles a blob macro would help, but for the 
medium-sized ones, an asymmetrically scaled sphere would work. To do 
this, just sandwich together a hemisphere and a sphere with different 
scales, and use merge to remove the interior surfaces. Something like 
this:

merge {
    difference {
        sphere {< 0, 0, 0>, 1}
        plane {y, 0}
    }
    sphere {< 0, 0, 0>, 1 scale < 1, 0.5, 1>}
} 

Or you should be able to get some interesting isosurface bubbles...

-- 
Christopher James Huff - Personal e-mail: chr### [at] maccom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://homepage.mac.com/chrishuff/
TAG Web page: http://tag.povray.org/

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