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Dan Connelly <djc### [at] yahoo com> wrote:
> In principle in ray-tracing, you could use one-sided polygons, right? Right-handed
polygons for one side, left-hande
d for the other side, of the transmitting/reflecting surface.
>
> POV doesn't support one-sided polygons, however, I believe.
Well, it supports two-(different)-sided triangles, by specifying both texture{}
and inside_texture{}
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