Thanks comment. I used glass wings, with thickness. Caustics would not look right if a
plane or disc were used.

Alf


Sigmund Kyrre Aas <as### [at] studntnuno> wrote in message
news:38BEF381.1B99566D@stud.ntnu.no...
> Very nice wings, although I doubt real wings would refract like this.
>

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