"Bob Hughes" <omniverse@charter%net> schreef in bericht
news:43fb7e31$1@news.povray.org...
> >> 2. interaction media and isosurface
> >Again, it's the container object intersecting the isosurface that seems
to
> > cause the problem. Try raising the accuracy of the isosurface (i.e., use
a
> > lower accuracy value). That worked with my tests.
>
> Oh, isosurface has a keyword for that, it's all_intersections. Won't help
> the fog bubble any but should eliminate those empty places where another
> object is in contact with a isosurface. There's also a way to give it a
> certain number of possible "intersections", the Help tells something about
> it. I wasn't paying any attention to those arches in that last image and
> only looked for the media container bubble. ;)
>

Thanks a lot, Bill and Bob,  for these thought.

Accuracy it is! I had forgotten that I had changed the default value for
faster render. Did not realise that it would also influence other things.
Very stupid... I had tried already increasing max_trace (or
all_intersection) but to no avail, so I was on the wrong track.

Remains the transparant object/fogs problem. Replacing one of the fogs by a
media is tricky to say the least, and will bring down my already very slow
render speed even more. I shall first try to leave it out altogether and see
what the image is like.

Again, thanks both of you for your help!

Thomas

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