"And" <49341109@ntnu.edu.tw> wrote:
> Oh, I will try later. I just found that the torus object's overlay area is not
> inside the object.
> And when I use polynomial object directly it shows strong precision problem
> because my torus is too small.

I said it shows strong precision/accuracy problem. It happened when I tested it
with inside() function. But when I test it with inverse and intersection this
time, it overturn.

This is an (inversed) polynomial torus intersect a sphere and the torus object
version.

http://news.povray.org/povray.binaries.images/thread/%3Cweb.552405c288bb499a123791000@news.povray.org%3E

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