pan wrote:
>>Do you start counting with 0 or 1. Remember that 0--256 are in fact
>>257 elements. Does this solve the problem?
> 
> Thanks for replying.
> 
> I did state I have spent three days on this problem.
> I'm aware of what base indexing povray uses for arrays.

Sorry about that. I made the same mistake once in another programming 
language and sometimes one doesn't mention such a simple problem, even 
after several days of work.

Florian

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