William F Pokorny <ano### [at] anonymousorg> wrote:

>
> Aside: Zero thickness boxes I'd think problematic in any case. Not
> opaque, differing inside/outside textures etc. Perhaps to the point the
> parser should complain on seeing such a box. Maybe something else
> meant...
>

I use a fair amount of zero-thickness boxes-- for 'billboard' images and such
like-- and haven't encountered any problems so far. But not placed right up
against another object (re: coincident surface problems).

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