Cycles eye darkening.

[Dave Maez]

(Briefly touched upon in #96).
I don’t think this is a bug with the plugin, but just an issue with Cycles' refraction shader that causes things behind it to get darker.

I’ve been manually working around this by only showing the refraction to the camera light paths, and sending everything else through a transparency. For example on a G9 character’s eye moisture and tear materials:

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Which gives me results that I find pleasing (no darkening of the eye, but it still retains a better wet look than the IRAY render):

It’d be really cool if the plugin could do this for me.

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[Alessandro Padovani]

Thank you for pointing this out.

No, it’s a issue with fresnel, camera ray will not work in the general case not even for thin walled. Now I have to go will post the solution tomorrow.

edit. Done, see #1368.