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View Full Version : Why doesn't HAIR work with JOINTS?


cmyk
06-13-2007, 08:23 AM
No matter what I do, I can't get Hair to move with my model as it's deformed by the joints. WTF?!

Someone help!

cmyk
06-13-2007, 08:26 AM
The weird thing is that the guides auto-update, but the hairs don't. So when I render, it's all out of place. I think it's a bug?

Skamierski
06-13-2007, 08:39 AM
strange, normally the hair is fixed to a region, polys, vertices or whatever.
this worked fine for me, several times.

could it be, that u accidentely cut off the roots from your model , or deleted the fixation seomehow?
this happens sometimes when u transfer hair from one model to another or by changing mesh attributes of your model

thats all what i know about it

cmyk
06-13-2007, 02:15 PM
See, that's the weird thing. The roots are intact. I even tried regrowing hair from the mesh and starting over fresh. The guides even move with the mesh. But when I render (or even draw the hairs in the editor), it's like it doesn't update to the new guide's position. Totally miffed over this. I'm pulling my OWN hair out.

AdamT
06-13-2007, 02:59 PM
I haven't seen this problem. Can you post a scene, or at least a screenshot of your heirarchy?

cmyk
06-13-2007, 03:39 PM
Sure thang (note the wing/arm position of the mesh, related to those of the hair in the editor view over time):

http://goodcomics.com/end/cgtalk/hier.jpg

cmyk
06-13-2007, 03:48 PM
I'm using MoGraph to apply the primary feathers to the arm of the wing. You think that's messing things up?

AdamT
06-13-2007, 03:50 PM
Hm, I wonder if it has something to do with the Morphing? Maybe trying playing with the priority of the Hair objects relative to the Morph tag?

cmyk
06-13-2007, 03:54 PM
Hm, I wonder if it has something to do with the Morphing? Maybe trying playing with the priority of the Hair objects relative to the Morph tag?

*gulp* How do I do that?

I see where I can set priorities in the HAIR object (unto no avail)... but how do I do that in relation to the morph tag?

cmyk
06-13-2007, 03:58 PM
Also, if it makes any difference, I'm deforming the wings using IK... not morphing. I'm only using morphing for the eyes and talons.

(do chickens have large talons?)

EDIT: I just tried deleting the Morphs and the MoGraph elements from my scene, and still the issue persists. So it must have something to do with joints?!?

AdamT
06-13-2007, 05:00 PM
I'm at a loss. Why don't you send your scene to Maxon Tech Support and see if they can troubleshoot it?

LucentDreams
06-13-2007, 05:32 PM
m mograph would be the problem in my theory but hard to tell sadly with out a scene in front of me

hair definitely works with pose mixer and morphs so that shouldn't be a problem. What objects are the hair specificlaly applied to? The HN, the mesh inside the HN, the cloner, or the object inside the cloner?

cmyk
06-13-2007, 08:40 PM
m mograph would be the problem in my theory but hard to tell sadly with out a scene in front of me

hair definitely works with pose mixer and morphs so that shouldn't be a problem. What objects are the hair specificlaly applied to? The HN, the mesh inside the HN, the cloner, or the object inside the cloner?

It's applied to the mesh itself. Id could be the cloner... but i REALLY need that for the primary feathers. I even tried deleting that from the file, but the hair was still acting up.

Quadart
06-13-2007, 10:02 PM
Might be silly, but did you disable Hair dynamics?
Hair dynamics can cause some unwanted effects on a rigged object.
I just played around with a 2-boned object with Hair in a MG Cloner with no problems.

cmyk
06-14-2007, 01:11 AM
Might be silly, but did you disable Hair dynamics?
Hair dynamics can cause some unwanted effects on a rigged object.
I just played around with a 2-boned object with Hair in a MG Cloner with no problems.

Yehhhh.... tried that too, and about a million other permutations. I'm starting to think it's just something exclusive/buggy about this model/scene.

obeardy
06-14-2007, 02:16 PM
Yehhhh.... tried that too, and about a million other permutations. I'm starting to think it's just something exclusive/buggy about this model/scene.

Do you have any material styling applied, density, clump etc? if so try turning these off and see if it helps. Only ever seen one scene like this before and it turned out to be a problem with clump.

cmyk
06-14-2007, 02:37 PM
Do you have any material styling applied, density, clump etc? if so try turning these off and see if it helps. Only ever seen one scene like this before and it turned out to be a problem with clump.

Iiiiinteresting. I do indeed. I'll turn it off and see...

OMG!! THAT WAS IT! Thanks so much! You sir, are a genius.

NOW... I'm kinda screwed, cuz i was relying on that for the feather effect. Hmmm...

cmyk
06-14-2007, 02:44 PM
WORKING CONCLUSION:

You can't have Clump turned on in the hair material, unless you click off "Include Roots" under the Clumping setting within that material.

Thanks a million obeardy! You saved the day.

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