I've made a wine glass with our CAD program and exported to POV as a
mesh. Alone this glass looks quite all right, but if I place two of
these glasses so that the closest partially obscure the other things
get really ugly. Where the glasses overlap the result is a dark area.
First I thought that this was some strange refraction related mistake,
but even if I turned off refraction entirely, the atrifact persisted.
I have attached the .pov file complete with two glasses placed behind
eachother. I don't know how to describe the artifact so if you would
please take a look. (The .pov file is on 3.01 format, but 3.1 versions
should read it all right).
I'm sure I've done something stupid because this can't be a POV bug.
After all, POV is well-tested raytracer and thousands of people are
using it. So it must be me ;-)
Thanks for any help!