> I know this issue has frequently been discussed, but I would like to understand
> the reason with the goal, to adjust my scene:
>
> In a scene with many transparent objects with emitting media such as:
>
> sphere{P, r pigment{rgbt 1} hollow no_shadow interior{media{emission rgb 1}}}
>
> rendering stops with the message:
>
> Internal limit exceeded in FixedSimpleVector
> Fatal error in renderer: A POV-Ray internal nesting limit was reached.
> Render failed
>
> if
>
> 1) the number of objects exceeds a certain number
>
> 2) the objects come close to each other and overlap
>
> Changing bounding on/off or max_trace_level does not help.
>
> Is there anything I can do?

Try to minimise your scene as much as possible whilst it still produces 
the error, then post the code here.

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