> I'm trying to set up a model for a physics experiment I'm doing. The gist of it
> is there is a crystal suspended in a liquid over a light source with a camera
> above it. I'm trying to set up a povray model where the liquid and the crystal
> have different indexes of refraction. The problem is it seems that changing the
> index of refraction of the crystal has no effect on the model. IE, if the index
> of refraction of both the crystal and the liquid are one, the crystal is still
> visible. Any help doing this would be appreciated.
>
> I've pasted my code below. The liquid is the ellipsoid and the crystal is the
> box.
>

A few questions:
Why are your dimentions so small?
The camera is at 0.01 unit, the sphere have a 0.001 unit radius, the box 
is only 2/10000 unit whide.

You seems to be working in meters, there is nothing preventing you from 
working in mm or smaller units.

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