Thanks for the explanation. Rafal probably has PAL at 50 FPS instead of the
60 for NTSC. And if PAL begins with odd lines too the +uo switch will be
needed since POV-Ray starts out with even lines. Although, perhaps it
already is conforming to PAL as is?

"None" <Non### [at] onca> wrote in message
news:Xns### [at] 204213191226...
> I've done field rendering work in the past for NTSC TV output, but not
with
> Povray.
>
> Everyone thinks NSTC TV has 30 full frames per second, but it actually has
> 60 half frames per second containing odd and even lines that are
> interlaced.  So YES, you will need to render twice as many frames, but
they
> will be half frames, NO they are not combined into a single frame
> afterwards, they are output INTERLACED, first the odd frame, then the even
> one, and so on at 60 (half)FPS.  And get this: each interlaced half frame
> is actually different in time than the previous interlaced half frame.
> NTSC TV actually records movement at 60 (half)FPS, most people do not know
> that.

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