I haven't used crackle for stars yet but it does look promising.
What I have used is granite, like this:
sky_sphere
	{
	pigment{
		granite 
		color_map{[ 0.9 color Clear][ 0.9 color White]}
		scale .02
		}
	}

This has been one of my standard include files for years.

Zeger Knaepen wrote:
> 
> TonyB wrote:
> >
> > BTW, I must know how you did the stars in the bg. Please explain.
> 
> It's a crackle pattern.  Not the standard one, but I don't know the
> 'form' I used.
> I'll look it up for you.
> I'll put it on my webpage, someday...
> Next year, or something...
> When I find the time to do so...
> 
> ZK
> http://www.crosswinds.net/~povplace

-- 
Mr. Art

"Often the appearance of reality is more important 
than the reality of the appearance."
Bill DeWitt 2000

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