"Nieminen Juha" <war### [at] sarakerttunencstutfi> wrote in message
news:38b027d7@news.povray.org...
|   I made a refraction test and I'm a bit confused.
|
|   For the test, I made a typical glass-container-with-water object in three
| different ways:
|   1. The water cylinder is just a bit smaller than the inner surface of the
| glass cylinder.
|   2. The water cylinder is just a bit bigger than the inner surface of the
| glass cylinder.
|   3. The glass cylinder has no inner surface (it's just like a solid object);
| the glass cylinder is just inside it.
|
|   One could think that at least 1 and 2 will produce a quite similar object.
| However, the difference between them is very noticeable (see image). The
| third case looks almost like the second one (except that the color of the
| water is less filtered by the color of the glass). Notice also how the
| top of third glass cylinder refracts the water more than the other two
| (although this may be due to the max_trace_level).
|
|   Why this difference between 1 and 2? Which of the three is the most
| physically accurate?
|   At least to me the first one looks the best (but I don't know if it's
| the most realistic, physically speaking).

A cross between #1 and #2 I'd believe, so I see what you mean; I don't see how
that would be possible to do.

Bob

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