ingo <ing### [at] ingodemonnl> wrote:
: 1. Although I don't need mutch detail I'd like to smooth the paper, so how
: to calculate the normals for smooth triangles?

  You can use my triangle mesh smoother:

http://iki.fi/warp/PovUtils/smooth.html

-- 
main(i){char*_="BdsyFBThhHFBThhHFRz]NFTITQF|DJIFHQhhF";while(i=
*_++)for(;i>1;printf("%s",i-70?i&1?"[]":" ":(i=0,"\n")),i/=2);} /*- Warp. -*/

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