Andrew the Orchid <voi### [at] devnull> wrote:
> Turning on dispersion seemed to produce a really huge speed reduction -
> even with it set to only 2 samples. I was expecting it to be
> approximately 2 times slower... but it seems vastly slower than that.
> (It goes from thousands of pixels per second down to 40 or so.)
>
> Can anyone explain to me why that is? What have I missed here?

I'm only guessing, but I think that the dispersion is allowing rays to get
to places in your scene that they weren't reaching without dispersion and
they're getting involved in more reflections. Also, dispersion does weird,
unreal-looking things with less than 5 samples.

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