For some reason I just started having this issue. When I render a video in iclone I get odd artifacts on my hair.  Like the below photo.  When I watch the animation in the preview window I do not see the artifacts.
Is there a setting i'm missing?




Here is a snippet from the preview window

That is a price to pay for a "Full screen render optimization"
Render with normal size view-port and artifacts are gone (it would render slower though)

This is a long standing issue. Speed vs opacity maps processing.
RL have chosen the path to officially support "Full screen render optimization" (which some of us were using unofficially in the past to speed up the render).
But they never investigated the downside of it (I talked about it at some point in the past).

Full screen render


Normal screen (Ctrl+6) render

How do I make sure its turned off?  

This is my settings. Do I check that box then?

How do I make sure its turned off?  

This is my settings. Do I check that box then?

No, you have to keep it unchecked, and in addition decrease the viewport size before you start the render until all artifacts are gone.
I would test it with single image render with each viewport size decrement.

Bottom line is: the smaller viewport size, the less chances to get opacity artifacts on closeup shots

BTW, your second screenshot seems to be taken from a Full viewport size.

Ahhh! I get what your saying!    Thanks!!!