I've seen that happen, and in each case I was able to cure it by moving the
camera by a small fraction.

--Gary.

Rob Napier <rna### [at] ciscocom> wrote in article
<355### [at] ciscocom>...
> When rendering at high resolutions (4200x3000 and 8400x6000), I keep
> getting:
> 
> 	Illegal grid value in dda_traversal()
> 
> This is POV-Ray 3.0 for Windows. The image seems to come out fine, and
> the errors don't start until a ways into the image (it seems to vary),
> but I get a lot of these messages to the console. Like I said, the image
> itself seems fine, so I thought it might be a display routine, so I
> tried turning off the render window (which I should have done a long
> time
> ago anyway...), but I still get the errors.

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