In article <web.3e8bb334eee3489b34dff4bb0@news.povray.org>,
 "Retsam" <nomail@nomail> wrote:

> I thought of that, but I couldn't figure out how to make it work in both
> directions.  Since a mesh object has no inside, how can I make it so that
> light travelling the other way will enter "glass" when it exits the water?

Use a closed mesh so it hits the glass again. Or don't use a mesh.
And solidness of the object doesn't matter, as long as it is closed.


> Since the IOR engine tracks what it is "inside" of, when it leaves the
> water, it will hit air, and when it reaches the other side of the glass, it
> will get confused, because it wasn't inside the glass to begin with.

This tracking is exactly why using a mesh is unnecessary.


> Is there a way to make surfaces that can be intersected from one side, but
> not another?  You know, so that you can make the glass and the water on the
> glass/water interface one-way surfaces (i.e., you can go from the water to
> glass and glass to water)?  In other words, it would only intersect one of
> the two surfaces, depending on which direction it's going?

The closest thing is inside_texture, which isn't quite what you 
describe. For one thing, it won't let you change ior. There is no 
feature that does exactly what you describe.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

Post a reply to this message