Tim Nikias <JUSTTHELOWERCASE:timISNOTnikias(at)gmx.netWARE> wrote:
> Which object wouldn't have an inside, so that nesting doesn't occur? Do
> triangles have insides? Something that could replace the disc in the
> particle system but doesn't add to nesting?

  AFAIK triangles do not have an inside (which is why meshes do not work
in CSG unless a very specialized insideness test (turned on with the
'inside_vector' keyword) is used). It may well be a good idea to use
meshes instead of discs or other solid objects for a particle system.

  If you are unsure, test triangles in CSG to see if you can find their
"inside", as with the disc.

-- 
plane{-x+y,-1pigment{bozo color_map{[0rgb x][1rgb x+y]}turbulence 1}}
sphere{0,2pigment{rgbt 1}interior{media{emission 1density{spherical
density_map{[0rgb 0][.5rgb<1,.5>][1rgb 1]}turbulence.9}}}scale
<1,1,3>hollow}text{ttf"timrom""Warp".1,0translate<-1,-.1,2>}//  - Warp -

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