The last four or five frames ballooned to over 20 min to render, each. Why? Poser figured out that the daffodil leaves were not fully opaque and had to compute the translucence on 4 raytrace bounces; notice the light coming of the edge of the diamond right thru the yellow petal in the last frame!

That 'edge' of a brilliant-cut round diamond is called "the girdle" by the way.
http://en.wikipedia.org/wiki/Diamond_cut

I am going to post a link to this animation in the forum, plus at CP and RDNA, with a link to this thread. By all means keep commenting on all things diamond, reflection and refraction here, if desired.

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