This time, I suspect your problem is too low max_trace_level.
If your glass globe is constructed of a difference of 2 spheres, you need a
max_trace_level of at least 5 to see through it (this the default level). Add 
butterfly wings and the required max_trace_level is 6.
You can check the render statistics, it contains the 'Max Level' entry. The
first number here is the minimum required level. Second is the level you are
currently using.

Margus

James Wood wrote:
> 
> Thank you for your quick response. It worked generally; now to put the
> thing inside a glass ball or globe it comes back. Now how do I get rid
> of it?
>

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