ABOUT BUG:
Well, I recently ran into a weird bug in Unreal Engine 5 where weird hairline streaks appear even though there are no joints or intersections.
Video with an issue:
And the most interesting thing is that everything is fine in Maya.
In the end - the developers helped me to solve this problem and I would like to thank Leonhard from our team and Charles from Epic.
SOLUTION:
If you look at the material, there is a Scaggle part in the material that changes the tangent direction. If you play with the ‘Scaggle’ amount, you can see that the issue disappears or reappears (I increased the hair width for better seeing the issue.
I’m not sure about the exact intended logic with it, but it seems something might be off.
That’s all
Thank you and have a great day
Best regards,
Andrew.