I use a particle system to simulate fur (for an animation). To mimic the structure of the fur I combed it back.
Unfortunately, the 'Simple Children' option spawns some shorter strands of hair which I can't explain as all of the hair particles are much longer and pointing backwards.
Those strands of hair pretty much seem to ignore their parent particles.
What am I doing wrong?
Close up view (pointing topwards):
I use blender 2.93.5 on linux.
Some of my attempts that turned out false:
- First I thought it is caused by the emitters 'Subdivision Surface' modifier, but the 'Use Modifier Stack' option is checked and the problem also occurs when I apply the modifier.
- Then I thought it is caused by the kink, but the undesired hair is also spawned when there is no kink at all (the hair is less prominent though).
- Obviously I also tried to comb the hair in a different manner, but this barely affected the shorter hair.
In case anyone is wondering why I don't use the 'Interpolated Children' option: The result seemed very unpredictable with 'Hair Dynamics' activated as well (at least for this kind of animation).
I did separate the fur into smaller particle systems, which made it more obvious that the problem is caused by the behaviour Allen Simpson discribed.
On the blenderartists forum someone suggested that it could be caused due to an excessive radius on the children.
The 'Root' parameter definitely contributes to the overall effect, but doesn't seem to be the cause of the problem.