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Hair
Legal Notice
Autodesk® Maya® 2008
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Graph Layout Toolkit © Copyright 1992-2003 Tom Sawyer Software, Berkeley,
California. All rights reserved.
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Mozilla codebase under the Mozilla Public License. Source code may be found
at http://www.mozilla.org/source.html. The Mozilla software is distributed under
the Mozilla Public License on an "AS IS" basis, WITHOUT WARRANTY OF
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All rights reserved.
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Table of Contents
1 Introducing Maya Hair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
About
Hair overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Hair connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Paint Hair Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Rendering Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Hair Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Basic workflow for Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2 Creating hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
About
Overview of creating hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Start, Rest, and Current Position curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Passive hair curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Creating other models and effects with hair. . . . . . . . . . . . . . . . . . . . . . . . . . 16
How do I?
Use hair presets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Create your own hair on surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Choose which hair curves to display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Select hair, follicles, curves, and CVs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Set hair curve positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Assign a selection to a hair system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Select which UV set to use for Hair (polygons only) . . . . . . . . . . . . . . . . . . . . 22
Make curves dynamic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Transplant hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Delete hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3 Simulating hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
How do I?
Play a hair simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Use hair caches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Create a hair cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Append to a hair cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Truncate a hair cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Delete a hair cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Hair and Dynamic Curves
3
Table of Contents
4 Modifying hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
About
Styling hair and modifying the hair look and behavior . . . . . . . . . . . . . . . . . . . 31
Related topics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
How do I?
Style the hair and modify behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Change the look of the hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Paint hair follicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Paint hair textures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Modify the hair system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Modify hair follicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Adjust the hair length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Edit hair curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Hair curve editing tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Braid hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Make hair collide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Fine tune collisions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Set up hair constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Hair constraint types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Work with collision hair constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Assign hair constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Related Topics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Assign a Paint Effects brush to Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Tips for Paint Effects brushes assigned to Hair . . . . . . . . . . . . . . . . . . . . . 48
5 Rendering Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
About
Rendering scenes with hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
More about rendering hair in mental ray . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Rendering hair in the Maya software renderer vs. mental ray for Maya . . . . . 51
How do I?
Set up hair shading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Hair system shading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Follicle shading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Tube shading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Set up hair self-shadowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Render scenes with hair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Hair and Dynamic Curves
4
Table of Contents
Rendering using distributed render . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Sample hairstyles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Create wavy, curly hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Create ponytails and braids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Sample dynamic curve scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Dynamic spline IK chain illustrated using a butterfly tail . . . . . . . . . . . . . . . . . 63
Stiffness Scale along curve and emit particles from curve example . . . . . . . . . 65
Advanced tips for working with Hair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Max Hair Density option variable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Using the pfxstrokes command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Using a follicle node as a point on poly constraint . . . . . . . . . . . . . . . . . . . 69
Attaching a skipping rope (dynamic curve) to hands . . . . . . . . . . . . . . . . . . 70
Hair as a wire deformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Troubleshoot Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Hair simulation is slow when using NURBS Curves output . . . . . . . . . . . . . 70
Undo doesn’t work with Lock Length on . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Unruly, jiggy hairs during playback. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Scale Hair Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Paint Hair Follicles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Paint Hair Follicles Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Paint Hair Textures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Hair > Create Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Hair > Create Hair >
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Hair > Scale Hair Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Hair > Paint Hair Follicles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Hair > Paint Hair Textures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Hair > Get Hair Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Hair and Dynamic Curves
5
6 Samples and techniques for Hair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
How do I?
7 Hair Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Reference
8 Hair Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Reference
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