Am 30.11.2010 18:48, schrieb kf42:
> Hi all,
>
> I'm trying to use a transparent object to hold some media. Problem is, the
> bounding object doesn't stay invisible if it's embedded in media itself. I'd
> think this is a common problem, but I only found one relevant thread ("realistic
> smoke with high degree of transparency"), and I'm already following all the
> guidelines therein.
>
> I attach a minimal example below. In this case the bounding object is empty; the
> goal is just to get it to blend into its surroundings. I've tried to fill the
> sphere with uniform media to "match up" with the outside, but there is no
> density (set by clock, ranging from 0 to 10x the outside density) that works.
>
> Has anybody seen this before?

It's a typical effect with media in fully-transparent containers.

Actually what you see is /not/ the container itself, but rather the 
outline of the media - which obviously coincides with the container 
unless you implement some density gradient falling off to zero as it 
approaches the container.

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