Hello.
  Some time ago I was thinking about features of POV-Ray I've missed. I
wanted to learn POV-Ray and SDL features more deeply. There are a lot of
them, so, I decided to start with primitives. Here is the result of quartic
exploration. I like it and I hope, it is interesting for somebody.
------------------------
#declare a=1;
#declare b=-1.5;
#declare R=1;
quartic {
<
a,0,0,0,0,
0,0,0,0,b,
0,0,0,0,0,
0,0,0,0,0,
a,0,0,0,0,
b,0,0,0,0,
a,0,b,0,R
>
  sturm
}

------------------------

Sincerely Yours,
Alex  Kluchikov.

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