Hair Tool for Blender

By

bartoszstyperek

I developed Hair Tool, addon for Blender, to simplify creation process of low/medium poly hair models

This addon will help you generate hair mesh ribbons with uv's from bezier/nurbs curves. It is how most current games are doing hairs for characters.

For blender 2.8 use Hair Tool 2.0.x series. For blender 2.79 use HT 1.9.x.

Online documentation here (for blender 2.79 for now)

Features:

• ability interactively groom hair ribbons based on blender particle hairs
• generating hair ribbons guided by grid mesh surfaces
• ability to uv unwrap and preview textures on hair curve ribbons
  
• easy and convenient switching back and forth between curve ribbons and  mesh mesh, while preserving mesh uv's
  
• ability to adjust ribbons radius profile over strand length to taper the ribbons shape
• ability to convert curves to blender Particle Hair system
• Generating vertex color and weights gradients for ribbons.
• and more
  

Part of $ I make on this addon wil go to Blender Foundation (I think around 20%).

Basic workflow is:

• create grid mesh (quad only) in basic shape of hair, that will be source of hair curves
  
• mark one of border edges as sharp - it will be root of generated hair
• Use button 'Curves from surface' - to generate curves. Play with F6 setting to vary the look, amount of splines
• Generate hair ribbons by pressing 'Hair setup' button.
  
• If you want to switch to mesh version of you curve based ribbons, press 'Curves to Ribbons' button.

Detailed info, links to youtube tutorials can be fund on MY BLOG

Discord server where you can report bugs: https://discord.gg/cxZDbqH

I also recorded tutorial about using this addon, with some tips and tricks, problem solving and stuff: https://youtu.be/FLHbzCXOijg
Old video: https://youtu.be/WE0aBe8SNls
Video about hair shader: https://vimeo.com/229043427
Video about creating texture: https://vimeo.com/228873075

What you get:

• Hair Tool addon for blender2.79 (old) and beta version for blender 2.8
  
• demo blend file (bit old now, for blender 2.79), with models that were used to render promo image for Hair Tool. It contains: female head, hair material, hair alpha texture, hair ribbons (4 styles), surface objects that were used to generate hair splines.
  

Update 1.1:

• works better with custom unit scale
• added radius param, to 'Change radius profile' operator
• source surfaces will take modifier into account (eg. mirror)

Update 1.2:

• Adjust generated curves tilt, so it is aligned to source mesh surface with new - 'Align curve tilt' button
• Added ability to generate hair spline ribbons from blender Particle Hair system.

Update 1.3

• added 'Randomize Spacing' option when generating curve hairs from surface
  
• added 'Uniform' option (for hair spacing, and strand points) when generating curve hairs from surface

Update 1.4:

• added ability to attach curves as particle hair system 'Particle Hair from Curves' (this can be used to import zbrush fibermesh curves and use them as blender Particle Hair system)
• added 'Generate ribbon weights' - make vertex group with gradient from ribbon root to tip
• added 'Generate ribbon vertex color' - make vertex color with gradient from ribbon root (black) to tip (white)
  

Update 1.5:

• added ability to draw multiple uv boxes when using 'UV hair' operator. Each ribbon will pick random uv box. It helps differ the texture look.
  
• Added 'Curve Resample' - changes number of points the curve is made from.
• Added options 'Select Tips', 'Select Roots' under Blender 'Select' menu (visible during curve edit mode, on bottom header bar)

Update 1.6:

• New option 'Ribbons from particle hair with children' - gives better result compared to child particles generated by build in blender child particles (more even distribution, better aligning of child ribbons to surface). Great for short Hair.
  
• Resample - more options, and keeps curve tilt and rotation.
• 'Particle Hair From Grease Pencil' strokes painted in grease pencil, can be converted to particle hair (with some options available under f6)
• 'Flip UV' option in preferences - if enabled random strands will have uv's flipped in X-axis

Update 1.6.4:

• ability to add 'random vertex color per ribbon'. Can be also used on non hair meshes, to add random ID vertex colors per loose mesh parts.
• ability to add presets for 'Ribbons from particle hair with children' operator

Update 1.6.5:

• added "Smooth scale" - similar to 'Smooth Tilt' but smooths the radius
  
• added 'Edit curve profile', 'Close Curve Profile' - if you want  to adjust curve bevel profile by hand
  
• ability to taper roots of curves ribbons (previously you could taper just tips)
• added 'Placement jittering'  F6 option for 'Ribbons from particle hair with children' button - helps a bit to get more uniform child strands distribution.

Update 1.7

• ability to preview hair texture directly in curve ribbons stage. See video explaining new feature: https://youtu.be/gtbhmYEKGZE
• linear deformer tool - for curve modeling can be downloaded here: https://github.com/JoseConseco/mira_tools  (how this tool works is explained in video above)

Update 1.7.1

• hair resample and simplify operators preserve material order
• added options to remove, resize, reset - uv boxes when using "Draw uv area for Hair" operator in imaged editor window (found under spacebar).

Update 1.8:

• Particle Hair Combing with Interactive  Ribbons  see video -  https://youtu.be/r4da3J5omd8

Update 1.8.4:

• early support for texture baking. Baking panel is located in -> 3d View -> Tools -> Hair Baking panel. I will make short guide video soon. https://twitter.com/JoseConseco3/status/975484075841605633

Update 1.8.5 (11.04.2018):

• finished and polished hair baking in blender (ao, id, root mask, tangent map, normal, depth etc).
  
• added channel packing nodes (beta but should work 90% of time)
• video showing example worfklow and how baking works: https://youtu.be/0UAxl549pNA

Update 1.8.7 + 1.8.8  + 1.8.9(17.04.2018):

• added parameter - Output texture name - for hair baking
• changed 'Randomize Curve Tilt' operator - this change makes it now possible to make curly hair.

• added 'Generate Braid' Operator. See video below.
  

• In this video you will see who to create curly hair and Braid: https://youtu.be/iXjBCxesA_I

Update 1.9.2 (day 20.07.2018) -  some bug fixes added in 11.08.2018:

• added select Next/Previous to curve editmode -> Select menu. I will select next point on curve.
  
• Interactive Child particles count can be set manually over 2000 (use with caution)
  
• generated curve ribbons will now have the rotation applied (this fixes bad curve ribbons aligning - 90deg offset)
• New: Ability to copy hair curve profile. Located in HT menu -> Next to 'Close Profile'

Update 1.9.3 (26.08.2018):

• Fixed UV bug when going back and forward between curve and mesh mode.
• Randomize curve tilt - tilt can take positive or negative values.
• 'Include Parents' - option added in interactive hair combing - this will take into account Parent strands when using 'generate children option'.
• align curve tilt - make it work only on selected points. Previously it would align whole curve.
• Curve from grease pencil - now it has option to generate curve ribbons on the fly (https://bartoszstyperek.files.wordpress.com/2017/07/pg_to_curveribbon.gif?w=575&zoom=2).
  

Update 1.9.4 (03.11.2018):

• New clumping option added for - 'Curves from grid surface' operator.
• Speed boost to all tools that use curves resampling, including 'Interactive hair combing'. This affects lots of tools, but hopefully this didn't introduce any new bugs.
  
• fix jumping particle hairs when converting curves to particle hair
• Some of parameters can now be set above maximum value, by manually entering bigger values (eg. max curve ribbon width can now be set above 10)
  

Update 2.0.0:

• First blender 2.8 release. Some features are missing, and bugs are there. Do not use for production.

Update 2.0.1 (24.01.2019):

• video with progress on porting HT to blender .2.8: https://youtu.be/09CL8PbIHY0

Update 2.0.4 (09.02.2019):

• Curves from grid surface will now remember its previous settings, when executing for the second time.

Update 2.0.6 (27.03.2019):

• added auto-update feature, in addon preferences. When new release is out, you can use auto-update to automatically download and install  new version.

Update 2.0.7 (5.04.2019):

• Fix auto-updater not working for some users (no longer use https).
• Fixed curve align tilt on big meshes
• Added 'Target length' for hair drawing (when you draw hair, their length wont exceed this value if set above 0

Update 2.0.10 (22.05.2019):

• added compatibility with latest blender api changes  - use only with blender builds after 21 may!
  
• Improved speed in interactive hair combing and generation of curves from grid surface
• Better snapping algorithm when generating curves from grid

Update 2.0.11:

• fixed - bad result when converting curves to mesh hair.
• Fixed generating weights on mesh ribbons

Update 2.0.12 (05 July 2019)

• Fixed converting curves to Particle Hair (finally!)
  
• added ability to draw particle hair (removed 'Particle hair from GreasePencil option'). It is in same place, where curve drawing is (D- key panel)

Update 2.0.13 (07 July 2019)

• Fixed error when drawing curve ribbons hair