"screwtop" <cme### [at] ihugconz> schreef in bericht
news:web.440cd3ff38a1658e9f9718b50@news.povray.org...
> I'm trying to construct some space scenery containing a few very large
> objects (Sun, Earth, Moon), and a small number of space vessels (~200 m in
> length).  I started out using a scale of 1 unit = 1 m, but found that
large
> objects in the scene disappeared - they simply weren't being rendered.  I
> switched to 1 unit = 1e6 m, which I thought might be a good compromise,
> which is better, but the image is very grainy when both large and small
> objects are rendered in the same scene.  I think these effects must be due
> to limits of floating-point precision (this is POV-Ray 3.6 on 32-bit
> Windows XP).  Is there any kind of workaround for this?  I'd really like
to
> work to scale if possible.
>
> Is the 64-bit version of POV-Ray likely to work better for this kind of
> scenery? I am using an AMD64 system but currently have no 64-bit Windows
> installation; IIRC, SSE/SSE2 has 128-bit FP registers.
>

I am not sure if this will help you, but have a look at this message:
http://news.povray.org/436572fd%40news.povray.org
and the few following that (or even the initial discussion). You would need
version 3.6.0. Can be found on the ftp site of POV-Ray I think, or one of
the mirror sites.

Thomas

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