Help! Hair particle system won't follow the curve of the armature

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1

I got some trouble with my snake-like creature. I want the hair on the spine to follow the curve of the tail. I tried parenting it to the armature and it did this when I moved it:

2020-08-28
2020-08-281920×1080 437 KB

I also tried “3 vertex” parenting to the mesh, and it did this:

2020-08-28 (1)
2020-08-28 (1)1920×1080 431 KB

For context, I applied the hair particle system to a plane which I glued to my mesh with the shrinkwrap modifier (as with the hair on the head)

If anyone knows how I can make the hair follow the curvature, please help.

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2

I’m bad with particle hair, but maybe I can help clarify your problem so someone else can help.

My interpretation:

  • You’ve got two particle systems, Head hair and Back hair
  • You want the back hair to move according to the armature pose

Is this correct?

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3

Yeah pretty much. Each particle system is assigned to an individual object (a plane), so they’re not part of the main mesh, except through parenting which didn’t seem to work the way I did it.

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4

OK. So it looks like the plane with the particle system is moving to unexpected places when parented, is that right?

edit:
If that’s the case, maybe it has to do with the origin of the plane?

5

The plane does seem to move strangely, although the hair itself sticks to whatever thing it is parented to (either the 3 vertices parented to the mesh or the control bone at the base of the tail). I’m not sure whether the origin of the plane is the issue (I have it set to geometry, and I don’t know if any other origin setting would be better for any reason). Thing is, I need the plane to bend, but it will keep its fixed position, or at most, translate to another point in space.

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6

As far as the origin, it’s probably fine as long as it wasn’t accidentally left in some weird place, for example far away from the actual geometry.

If you want to upload your blend file I could take a look at it.

7

I never uploaded a blender file into the forum before. I tried now, but I can’t seem to figure it out. If you could explain it, I’d be thankful.

Also, I think I did progress to some measure. I took out the hair particle system and changed the mesh’s pose. The plane followed along, and only then I added the hair particle system, and now it looks fine. But for some reason this trick doesn’t seem to work for the arms (yeah, this creature is pretty weird). I could just leave it at that, but it’s frustrating that I can’t control it as I want to.

8

You can’t upload a .blend file directly to the forum. You will need to host it on a file sharing site such as DropBox, OneDrive, or even GitHub and post a link to the file here.