In article <3CEB1EEB.E6D418C8@pacbell.net> , Ken <tyl### [at] pacbellnet>  
wrote:

>
>
> Zeger Knaepen wrote:
>>
>> While tracing my Star Destroyer model, I get this warning or error message or
>> whatever it is:
>> Illegal grid value in dda_traversal().
>> But it doesn't seem to affect the image or the tracing-process.
>> What does it mean?
>
> Please see -
> http://www.students.tut.fi/~warp/povQandT/miscQandT.html#ddatraversal

Or in the new 3.5 docs, section 9.5.2 .

    Thorsten

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