lathe { bezier_spline 8,
    <0,1><0.25,0.75><-0.07594,0.5><0.1875,0.1875>
    <0.1875,0.1875><0.3929,-0.05616><0,-0.5><0,-1>
}

File '/tmp/Empty.pov' line 17: Parse Error: Incorrect point in lathe.
Fatal error in parser: Cannot parse input.
Render failed


I can't appropriate to control point the negative value...
Why?????
To set the necessary form, I need a negative value!
At the same time the curve doesn't cross null value...

Look attachment:

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