I am having trouble with an artifact on a lathe object that uses hollow and
interior media emission. I simplified my code as much as I could. Specifically,
the original lathe uses a more complex spline.


Example code:
-------------

#version 3.7;

camera {
    location <0,0,-10>
    look_at 0
}

lathe {
    linear_spline
    2,
    <1,-100>, <1,100>

    hollow on
    pigment {rgbf 1}
    interior { media { emission <1,1,1> } }
}


What I was expecting:
---------------------

A simple white cylinder crossing the picture from top to bottom.


What I got instead:
-------------------

The cylinder is cut in the middle: https://imgbox.com/nKVHRwXi

The size of the cut strongly depends on the distance of the two points given:
    <1,-100>, <1,100>
->
    <1,-1000>, <1,1000>
yields: https://imgbox.com/crXJfclu



Version: POV-Ray 3.7.0.4.unofficial
OS: Ubuntu 18.04


Any pointers of what I am doing wrong would be appreciated!

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