Quote - As promised: Here is a test render with the original BBeye (unaltered,  with original shaders but a new texture I am trying out), shadow disabled on the eyecover and rendered with BB's testlights. I've tried the IBL+Main+Rim light preset as well and the sharp edge is even more visible...

I can do more test renders if desired.

Have you loaded the texture map into both the eye and the eye cover materials?

-- I'm not mad at you, just Westphalian.