How are you supposed to do a composite with Hair and Fur? I've gone through the online manual and done all sorts of test renderings, but I always end up with dark edges of all hairs, so the compositing looks ugly.
See enclosed image.

Using Render Elements doesn't help.
Rendering hair only and saving as a png with alpha channels doesn't help
Going to Customize > Preferences > Rendering and then turn on Filter
Background in the
Background Antialiasing group doesn't help.
Changing to various Composite Method under Render Effects doesn't help.
I'm getting desperate! :-)
Both default scanline and mental ray gives me the same result... I would prefer mental ray if possible.
Any ideas?
Cheers Rob