"Wolfgang Wieser" <wwi### [at] gmxde> wrote in message
news:3ecbe79b@news.povray.org...
> Just wanted to clip off one half of an isosurface using
>
> clipped_by { plane { x,0 } }
>
> in order to be able to see the inside surface.
>
> However, this does not work. All the rays which enter the isosurface
> through the clipped-by plane just go right through the (back) surface
> leaving it invisible.
>
> Just wondering if this is a bug and/or how to work around it.

Not a bug, just the way iso's are. You will need to add all_intersections to
the isosurface before the clipped_by. Or try max_trace 2, or more. It's just
not getting the rays traced to the back surface.

Bob

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