"Tom Melly" <tom### [at] tomandlucouk> wrote in message
news:3e493283@news.povray.org...

> If so, it looks like there might be a bug in povray ("looks" - these things
> often turn out to have a reasonable explanation).
>

I don't know enough (i.e. "anything") about pov internals to know if this is the
case, but there might indeed be a reasonable explanation if your containers are
co-incident.

Basically, Pov may get confused as to whether it's inside or outside a container
(and therefore whether to render the media) when co-incident containers are
used.

As a general rule-of-thumb, it's best to avoid co-incident surfaces at all times
(they are a definite no-no if the surfaces have a visible pigment).

BTW I don't know which of your media params are necessary and which are not, but
they are *VERY* slow. Certainly for testing I would remove or adjust them for
quicker rendering time.

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