Whiteness issue with transparent surfaces?

Toyen

I don't know if this issue has already been addressed so I am posting a new discussion.

Have you guys experienced this?

When facing the source of the light in your scene, this issue pops up. I have seen it on hair an eyelashes so I suppose it affects surfaces with opacity maps?

Let me know if any of you are experiencing this issue and if there is any known fix for that!

Thanks a lot : )