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Tor Olav Kristensen wrote:
>
[...]
>
> After studying the image, I have now found that there seems to
> bee some problems with this rendering: Some of the spheres are
> not completely round and some "false" odd shaped shadows
> appear.
>
> See the first attached image.
> (Yellow arrows for cut spheres and red arrows for false shadows.)
>
> Has anyone else seen these kind of errors with iso-surfaces before ?
>
> If I remove my no_shadow keyword from the code, then many
> more "odd shaped" shadows appear. See the last attached image.
>
I had a quick look at the code, your isosurface function does have abrupt
changes of values and those often cause problems (i had problems when using
object_pattern in isosurface functions for example) increasing max_gradient or
accuracy might help, but in general functions with abrupt changes are not ideal
for isosurface functions.
Christoph
--
Christoph Hormann <chr### [at] gmxde>
Homepage: http://www.schunter.etc.tu-bs.de/~chris/
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