Why is my hair vanishing?

ALLIEKATBLUE

Something weird is happening.  I set up a scene, very simple G3f no other scenery just the figure. The scene renders fine until about 35 iterations then the hair begins to vanish. Not the whole hair, the scalp or base remains and the rest of the hair becomes increasingly lighter. This happens when using dome in scene setting with dome on. This is a recent occurrence because it hasn't been happening. And it doesn't happen all the tine just with certain light sets.

Toonces

This happened to me too recently. I think i just applied OOT base shader to an old hair and it happened. I think I fixed it by using one of the OOT textures. Not sure if it had something to do with transparency settings in iray or what exactly.

Wish I could remember more. Interested if anyone has a more definitive answer.

One thing to check -- make sure Render Settings > General > Auto Headlamp is set to Never.

ALLIEKATBLUE

I will check the render settings.  But the hair I used was already for iray, one was OOT updo and another was a hair from Prae. I remember reading this topic a while back but the search came up empty.