In article <01bf8ba4$f9328bc0$f0073ea6@default>, "H. E. Day" 
<Pov### [at] aolcom> wrote:

> My personal trick, without which I couldn't make anything, is what I 
> call Feathering.  
> ...
> Note how the powers of the three components add up to the power of the
> sphere you started with.  When rendered with other components this serves
> to greatly smooth the lines between components. The downside, however, is
> rather messy code. 

This looks like a good place to use a macro...all that 
copy-paste-modifying could be automated.
 

> You must remember to manually bound your blobs.   To do so put the 
> blob in a union {} statement,
> union {
> blob{....}
> }
> and use the same bounds on both.
> 
> union {
> blob {....
> bounded_by {...}
> clipped_by {bounded_by}
> }
> bounded_by {...}
> clipped_by {bounded_by}
> }
> 
> This will seriously speed the render up!

I think you could use the object keyword instead of union, and get the 
same effect(without the warning about only having one object in a CSG). 
And I think you might be able to use "hierarchy off" instead of the 
wrapper object...

-- 
Chris Huff
e-mail: chr### [at] yahoocom
Web page: http://chrishuff.dhs.org/

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