Jepessen <dan### [at] ciaowebit> wrote:
> When I deide to create a shape, how does program decide the meshing
> subdivision of the shape itself?

  You should urgently read some tutorial about raytracing.

  Raytracing and scanline-rendering are two completely different things.

  For a quick idea, for example if you render a sphere, a raytracer
calculates mathematically the intersection point of a line segment
(the ray) and a mathematical sphere (which is defined simply by a
center point and a radius).

-- 
#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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