stbenge <not### [at] hotmailcom> wrote:
> Hello,
>
> Here's my attempt at recreating an opal. It's not physically accurate.
>
> It's a mesh stone shape, with many mesh inclusions. Each inclusion is a
> disc-shaped chip, colored randomly, and given a specular highlight with
> a metallic value of one to really bring out the color. They were placed
> randomly. The ones residing inside the stone were rendered, the rest
> were not.
>
> Funny thing, the luminous bloom pass took longer to complete than the
> initial render itself. For some reason the black parts of the HDR image
> were the slowest. It could be an error in my code...
>
> Sam

Wonderful effect!

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(Obviously, if accidentally, or recklessly, you post the source, you make
someone really happy...)
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