bagginsbill,

Quote - The differences are not entirely due to shaders. Look at the edge of the iris. This is what I complained about many months ago - the hard edge. This edge was due to geometry, not to the texture. The new eye uses the same texture, but has a soft edge to the iris. And the iris-pupil transition is much more realistic.

I fully agree with the above. The right iris (left side of image) looks much better to me in all three examples.