Brendan Ryan <ary### [at] global2000net> wrote:
> Could a 2d equation be created for the patches?  Then to get them to 
> join seamlessly would just need the same tangent planes at the patches' 
> overlapping points.  Or would the control points need to be figured out 
> from equations that we make up ourselves?

  Joining bicubic patches seamlessly is easier than it may sound. See the
tutorials in the POV-Ray documentation referenced by Ingo.

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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