Hi thanulee,
Thanks for the file.
What you see is an effect that many will call the Euler Angle. The rotation of the Hair Guides moves through that point when it is vertically in your scene.
That wouldn’t be a big problem if it weren’t a long phase based on interpolation. Think of two splines, each moves progressively along your rotation, but one reaches the critical point earlier than the other.
This means the interpolated “Hairs” between the two guides take a while to go all through that point, again as they have interpolated results fo the guides. Since that takes time, it is more visible. But even if we shrink the time to one frame, it might not work.
As in the other thread about your Feather, I mentioned that Hair has no Rail option, as it was not built for that, but yes, we could argue that it should, and I would love it if it could just have an option to find an Euler free way to work.
What you need to do is to create a system that avoids the rotation and applies all the effects needed, then rotate the whole thing, as in the example below:
https://www.dropbox.com/s/ovjryvz5iqybxg7/CV3_S26_drs_22_HAtl_01.c4d.zip?dl=0
Besides, it doesn’t help to have turbulence working on it, as that is a spatial effect, and you move things through that space, so the turbulence move and the object, while the turbulence is responsible for the initial movement of the plane, which adds up.
I think it helps to rely on guides only, not on interpolation.
Perhaps check with the support if I have missed one option:
https://www.maxon.net/en/support-center
All the best
