hi scott,

thank you for the swift (~45mins!! wow) reply.

On 10/03/2014 16:13, scott wrote:
> .. *something* visible ..

I see what you mean :-)

>> camera {
>>    location <0,2,-5>
>      look_at <0,-4,0>
>> }
> ...
>>    contained_by { box { -10, 10 } }

well it gives me something to start from.  I now suspect that the object
isn't located at origin and/or that the camera may be somewhere inside
it (because the "*something*" looks like a small section of the object).

I'll play with it tonight.  thanks again.

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