Sunny nous apporta ses lumieres en ce 2005-09-29 09:16:
> Hello,
> 
> Using a version of Rhinoceros(version 3), 8 or 10 cylinders were modeled,
> and exported as a POV smooth triangular surfaces.
> I am exeriencing following error:
> 
>  Slab Building Error: cannot use non-perpendicular camera vectors with vista
> buffer.
> 
> Below I have listed part of the POV file. Any comment or suggestions would
> be welcome.
> 
> Thanks.
> 
> Sunny
> -------
> // POV-Ray file generated from Rhinoceros.
> 
> camera {
>    orthographic
>    location <38.3093, -13.2998, -27.5553>
>    //look_at <39.0715, -13.6047, 1.5526>
>    right <705.231, -3.82438e-017, -18.4671>
>    up <0.145038, 529.076, 5.53877>
>    direction <0.0261755, -0.0104718, 0.999603>
>    /*
>    // to get an image that's the same as the viewport in Rhino,
>    // uncomment this section and render with command line options (alt+c):
>    // +w403 +h264
>    right <806.729, -4.37479e-017, -21.1249>
>    up <0.145038, 529.076, 5.53877>
>    direction <0.0261755, -0.0104718, 0.999603>
>    */
> }
> 
> -----deleted ---
> 
> 

Your camera vertors are not exactly perpendicular. In your case, it's a case of
rounding to only 3 
or 4 decimal places. Try changing the very small value (-3.8243 e-17 !) to zero.
The scene should render just fine with just a, probably imperseptible, slight skewing.
As the vista 
buffer get disabled, the rendering may get slightly longer as you may loose some
optimisation.

-- 
Alain
-------------------------------------------------
What happens if you get scared half to death twice?

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