odf opened this issue on Oct 27, 2008 ยท 13981 posts
bagginsbill posted Tue, 08 September 2009 at 11:40 AM
I think your solution is excellent. For all intents and purposes, real refraction causes the iris to appear to be convex.
In fact, even the diffuse lighting of it behaves as if it were convex, even if it really is flat or concave.
If you work out the caustics (bending of arriving light rays entering through the cornea), then the iris is lit exactly as if it was convex.
Go for it.
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