In article <3de879f4@news.povray.org> , Micha Riser <mri### [at] gmxnet>  wrote:

> Floating point error analysis is a bit more complicated than you seem to
> think. For intersections calculations a ray-tracer needs to do a sequence
> of calculations and the error which is produced by the limitation of
> floating point precision is propagted. As there are different calculations
> done for each primitives it is natural that the floating point error
> effects are also different for each primitive. In short: What you are
> seeing is definitely an effect of FP precision.

No, this is wrong.

There is a very simple answer and I am sure there is some FAQ about it
somewhere as this question comes up every now and then.  The maximum
distance for which an intersection is calculated in POV-Ray is limited.  If
you want to create the solar system, you cannot use 1 unit = 1 m.  use
something like 1 unit = 1000 km and you should be fine.

    Thorsten

____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

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