> I'm also at a loss on the "whites" of the eyes. They either look glowing or
> plastic when I fiddle with the texture.

Try a semi-transparent surface (try a crackle pigment with a thin red band
at 0.0-0.05 or so in the colour map for the effect of blood vessels) with
some scattering media inside. Plus slight reflection & highlights to give
the impression of wetness.

For a realistic iris you'll want to layer some radial and spherical textures
with varying amounts of turbulence. Here's a good close up of an eye I
found: http://mysite.wanadoo-members.co.uk/journalspace/eye.jpg

I was trying to make a convincing looking eye recently (albeit one belonging
to a being from another dimension, however I was basing it on a human eye
just with very different colours). The iris was the particularly tricky
part. I didn't finish working on it since it didn't end up fitting into the
scene particularly well, but I'd like to use it elsewhere...

Pete

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