"Thorsten Froehlich" <tho### [at] trfde> wrote in message
news:3c21f2e1$1@news.povray.org...
> In article <Y++xgG### [at] econymdemoncouk> , Mike Williams
> <mik### [at] nospamplease>  wrote:
>
> > only if *all* the parts are hollow. I.e. substituting "union" or "merge"
> > for "light_group" in your code gives exactly the same effect.
>
> Yes, because a light_group internally is a (special) union...
>
>     Thorsten

So the 'hollow' in the sphere is ignored because the box isn't hollow?

-tgq

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