Hair Tool for Blender

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Hair Tool is Blender add-on that will help you: generate and model hair-card based hair, bake textures (with support for channel packing), do manual or automatic UVs, generate bones (with built-in jiggle preview). More than 30, fully procedural, hairstyle presets can be used as starting point for your work.

For Blender 4.2+ - use Hair Tool 4.x + 'HairLibrary_4.x_date.zip'
For Blender 3.6-4.1 - use Hair Tool 3.x, and HairLibrary_3.x_date.zip
For Blender 3.3-3.6 - use Hair Tool. 2.46 (last version that supports 'old' curves), and HairLib_18_12_2022.zip

Links:

Quick Start section in documentation - fastest way to get familiar with Hair Tool (10-15 min)
Documentation- for latest Hair Tool 3.x - it is is most up to date way of learning the addon
Hair Tool introduction video (for Hair Tool 4 - November 2024) - shows around 50-70% of how HTool works.
Discord server place where you can get support and report bugs
YouTube HTool 4 playlist videos (here is 'Hair Tool 3.0' playlist)
~~Hair Tutorial~~ ~~Part 1~~~~and~~~~Part 2~~ ~~by SinHouse - outdated~~
~~Old documentation- for old Hair Tool 2.46 - no longer maintained (last version that supported old curves and Particle Hair)~~

Studio vs Standard license: if you are company with above 180k $ income, please purchase Studio version. Both licenses (Studio and Standard) can be used commercially. Information about Hair Library license can be found here

Refunds - you can get refund for Hair Tool, if you request it - withing 2 weeks after purchase.

Customers who use Hair Tool add-on:

UNIGINE, Fatshark, Electronic Arts, Grip Studios, Tactical Adventures,Ubisoft , Squanch Games , Rocksteady, NEOVIZ, NextLevel Games , Remedy Entertainment, Digital Extremes, Avalanche Studios,Keyword Studios ,Rocksalt,PANACHE ,Maximum Entertainment , NCSOFT Sharkmob,Black Forest Games,QLOC,VERMILA , DEXTER Studios, Event Horizon ,NOBODY STUDIO , Emberstorm, Studio Gobo, TaleWorlds, BIGTOOTH STUDIOS and others.

There are multiple ways to generate hair-cards with Hair Tool:

Hair System - procedural hair generation based on geometry nodes - great for all kind of complicated hair styles (braids, curls, punk etc)
using grid Guide Mesh - where hair strands follow mesh loops - great for modeling: long hair, buns, fringes, eyelashes etc.
using Track To Mesh - where hair tips are glued to guide mesh - great for short to medium hairstyles
grooming tools - that can be used together with Blender Curve Sculpt mode and procedural effects - Deformers
drawing and extending hair strands similar to Grease Pencil drawing - now rewritten to use new hair curves,
short hair modeling - for short to medium length hair - animal fur, short human hairstyles. Hair-cards will be spawn from each mesh edge.
using shell hair modeling - great for very short hair: fur, carpets. Requires special material (there is UEngine material in HTool docs)

Some of the features:

tools for curve based hair modeling (cutting, extending, deforming etc) - rewritten to support new curves
automated UV workflow (you can define uv regions, which can then be automatically assigned to hair strand)
easy hair rigging and animation with Jiggle physics
hair library that contains various hairstyles and sub-components,
various adjustable ribbons profiles - Mesh Profile, Curls Profile, Circle, Flat, Braids etc.
convert: Curves to Particle Hair, Particle Hair to Curve ribbons, Curve ribbons to mesh ribbons and so on.
curve resampling and decimation (increases/decreases curve points count)
generating vertex color/weights gradients, transferring UVs and vertex weights from character to mesh haircards.
texture baking from new hair curves; supports: normal, ao, diffuse, tangent, ID, root, flow and more maps
build-in add-on auto-updater
and more

Bit older videos (for Hair Tool 3 - but mostly still valid) showing some hair modeling techniques:

hair setup in one minute
short hair creation using Shell Hair and Short Hair modeling techniques
create hair without grooming

Hair Tool can be used to export hair to Character Creator.

Check out CCreator Smart Hair system
Hair Tool to Character Creator workflow video tutorial
Smart Hair Shader Part 1 - Basic Parameters & Base Color in CC
Smart Hair Shader Part 2 - Effects & Save Materials in CC

Past Updates:

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 (16.12.2017):

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

Update 1.8.4 (11.01.2018):

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 1.9.2 (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 2.0.6 (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 2.0.10 (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 suface

Update 2.1.4 (25.08.2019)

Show warning popup when opening baking scene,
Hide braid deformer visibility in cycles,
added option in preferences to disable drawing grid mesh as 'WIRE',
fix braids generation, when only one curve is selected

Update 2.1.6 + 2.1.7 + 2.1.8(For Blender 2.81 16.10.2019)

support for blender 2.81
adjust particle hair length added (in 'interactive combing' panel)
more hair examples in hair baking blend scene
randomize rotation in interactive combing
flip UV in V (top-bottom) direction
new drawing mode - connected
fix hotkey - disabling drawing hair would erase ctrl+shift+H pie menu hotkey, and possibly other hotkeys too!

2.20 (for Blender 2.82 only 06.03.2020)

texture baking added padding support and new channel compositing nodes
mesh ribbons - added vertex AO bake with bounces approximation
taper curve profile (hack)
added flatten scalp to UV option in baking scene
mesh ribbons - added UV Pick from target
replaced default hair material - it no longer needs special light hack. But anisotropic highlights are still faked. It uses new texture too

2.22 (for Blender 2.83 only 26.07.2020)

Added Hair Modeling Workspace Tool
non square UV baking support,
added Straighten strand tool,
added ability to define custom texture suffixes in addon preferences,
interactive combing now support length vertex group,
you can pick uv which will be assigned to drawn strand,
added finalize option (merge all selected hair into one, new output mesh)

2.23 (for Blender 2.83 only);

fixed baking on solid background
fixed Z-up aligning error on curly hair generation,
possibly fixed auto-updater on MAC,
fixed uv drawing on curves with no materials,
fix error when using 'Curves from grid surface' with bezier curve output type
fix drawing particle hair regression.

2.24(for Blender 2.83 and 2.9x) 22.12.2020:

added Adjust Length for curve strands
Hair Draw - added Extend option
New 'Set UV region'
added Direction bake pass
faster and better looking texture padding

2.30 - 16.06.2021

Compatible only with Blender 2.93
Added UV Curls
'Profile Generate' now support generating round profiles (required for UV curls)
Added Auto UV with optional length threshold masking
Added 'Slice Curve Using Mesh' operator
Lost of new presets added to Hair Library. Get them from HT Gumroad site.
added cleaner uv for Vertex Groups masking in Interactive Grooming

2.35-2.36 - 20.12.2021 (For Blender 2.93 and 3.0 )

fixed braid generation in blender 3.0,
fix error when selecting hair strands that are too close to camera,
added hair rigging with jiggle,
Interactive combing now has option to use Blender particle hair settings,
Curves from grid now will work on single row of polygon meshes,
Load baking scene wont override the default baking scene. Added option to reset baking scene to default one,
Interactive Combing - added clumping option, updated UI,
fix curve from grid surface on blender 3.0

added Hair Generation with Geometry Nodes (VIP - mostly for baking textures, I take no bug reports yet, no docs were made yet),

2.37-2.38 - 12.06.2022 (For Blender 2.93 and 3.x )

Added Short Hair - new modeling technique
Jiggle simulation now works on multiple armatures simultaneously, it also works in animation mode too now (thus can be baked into animation),
Short Hair - now support picking UVs, Weights and other mesh hair operations,
added proper undo/redo to 'Hair UV' operator and improved box interaction precision,
Finished implementing 'Radius from UV width',
big speedup in UV Sampling and Weights Sampling operators (they are few times faster),
MMB will now adjust strand stiffness for workspace hair modeling tool,
added control over root radius in hair baking scene,
Short Hair - added option to keep sharp border edges when remeshing,
short hair - added option to rotate strands randomly (located in modifier props),
possible fix to Interactive Combing not generating profile on hair ribbons,
restored function of bringing back previous vertex groups in Curves from Grid surface,
Display warning when trying to bake texture with texture clamp size enabled in preferences,
fix ParticleHair from Curves when using Cloth grooming tool type,
added option to align Short Hair strand to comb direction"

2.40 - 11.12.2022 (For Blender 3.3 and above )

Huge update to Hair System - can be used for hair-cards generation now

2.41 - 13.12.2022 (For Blender 3.3 and above )

Fix being unable to add mask on Windows OS
Added UVs and Color transferring option (under Profile -> Utils)

2.42 - 09.03.2023 (For Blender 3.3 and above )

Remade UV and Color sampilng for short hair,
Short Hair Uvs can now be masked (and layered) by using vertex groups,
added Vert Color sampling operator for Mesh Hair objects
fix drawing UV boxes if not material is present

2.45 (for Blender 3.3, and above - Last update 12.05.2023)

Added New Shell Hair modeling technique,
Added Curls Profile,
Added Deformers: Braids, Align to Target, to Parent, Push Out, Embed Roots,
Hair System Uvs support multiple UV regions now,
added option to Bake curves generated by Hair System to curve object data,
Added option to bake Hair System uvs regions to mesh,
use new Interpolation in Blender 3.5

2.46 for Blender 3.3, and above - Last update 25.05.2023,

Added Track Curve and Mesh Deformers,
added Mirror Deformer,
Automatic parting of Hair System strands based on loose mesh islands,
Added Resample and Set Resolution operators for new Curves,
Synced Baking Texture setup with Default Hair Texture Setup,
fix - curve profile correctly supports UVs of profile made from multiple curves

Hair Tool 3.0 only for Blender 3.6, Last update 20.07.2023

New Hair Tool version, all curve profiles are now GeoNodes based,
New Hair Curves are now fully supported (dropped support of old curves),
added edit mode adjustment for radius and tilt (using Alt+S and ctrl+T) for new hair curves, subdivide, extrude, (un)hide, select root/tips, etc.,
'Curves From Grid Surface' are using geonodes now,
Remade - Smooth Operator - can smooth any 'FLOAT' Attribute and position,
Added ability to edit any 'FLOAT' attribute in Curves Sculpt mode,
Added Helper to Colorize Hair System Strands (manual), and UVs (random),
Cleaned up UI, hair modeling tools from right side panel moved into sub-panels,
'Filter Strands' do not force resampling of affected strands any more
Added ability to use Guide curve attribute as input mask 'FLOAT,
Replaced bgl with gpu module. Addon,
Added Smooth deformer,
Added Color Set (for system debug),
added Simplify Strands Deformer,
resample Deformer will keep original points spacing,
Added option to 'Import Baking Scene',
Added 'Duplicate Strands' and 'Generate Braids' into deformer > Generators section,
Whole Hair Library is moved to new Hair System and new Curves,
Added 'Hair with Track Mesh' one click preset,
Added 'Roll' deformer
Added 'Curve Attribute' inputs mask type,

Hair Tool 3.1 - for Blender 3.6, Last update 3.08.2023,

Restored options for 'Particle Hair from Curves' and 'Particle Hair to Curves, these are for old curves,
nicer error messages when trying to resample/decimate curve with no splines,
fix Deformer Updater - not reconnecting new sockets if available,
'Curls' deformer - added Project to/from Normal,
added option to copy and paste Deformers (with theirs input masks),
Added 'Separate Target per Island' switch option in Track to Mesh/Curve deformer,
restored option to flip UVs in Y axis (and fix error when reading Flip_y and no attribute is found),
fix Invert behaviour in vertex group input mask,
Vertex Group Input mask - added option to sample per strand root or by each spline point,
Fixed bone generation of mesh with no armature,
Added option to show HSystem popup panel from ctrl+Shift+H pie menu,
UV regions are now always unique (previously they could be shader between SetUVRegion deformers),
bugfixes

Hair Tool 3.2 for Blender 3.6, Last update 04.09.2023,

Added 'Physics' deformer for Hair System it will simulate hair with rope/springs - still VIP - notstable in some cases,
Added 'Attach To Surface' deformer,
Duplicate Strands Deformer will give more even strands distribution now,
Added option to disable random UV Flipping on profile,
Fixes for Curves From Grid Surface,
Switched AO generation from python to GeoNodes,
Fix Hair Baking material update - giving error,
'Embed roots' deformer - added option to use custom mesh surface,
AO - added option to write to alpha,
Changed behavior of 'influence range' input in Track To Mesh\Curve deformers,
Fix UV sampling,
simpler strand interpolation (simpler calculation of rotation difference),
fixed 'Draw Hair' on for users with non English UI,

Hair Tool 3.3 for Blender 3.6 and 4.0 , Last update 15.11.2023,

Blender 4.0 compatibility fixes,
updated curve edit mode - Adjust Radius and Tilt - to support soft selection ranges,
Fix excessive damping with time in jiggle physics,
Added 'Remove Strands' deformer,
Added 'Attach To Border' deformer,
'Selection Mask(Curve)' new modes: Multiply, Add,
Added option to switch hair curve direction under W key menu (curve edit mode),
Braids Deformer will be formed with more even distribution of strands (in older version - some of substrands be very thin or even missing - leaving braid made from only 2 visible clumps!)
lots of small improvements. still WIP.

Hair Tool 3.3 for Blender 3.6 and 4.0 , Last update 02.12.2023,

Added option to manually Flip UVs (for each strand) in U direction in 'Set UV Regions' operator,
Short hair - fix exploding hair when masking 'length multipiler' input with vertex group with zero weights (division by zero),
Fix UVs generation for Curve Profile type,

Hair Tool 3.5 for Blender 3.6 and 4.0 , Last update 23.12.2023,

Added option to manually Flip UVs (for each strand) in U direction in 'Set UV Regions' operator,
Short hair - fix exploding hair when masking 'length multipiler' input with vertex group with zero weights (division by zero),
Fix UVs generation for Curve Profile type,
Added option to link Flat Profile UV width, to strand radius.
Fix Hair Drawing not working if target object has not UVs,
Added ability to colorize UV Regions - and use this color attribute in hair material,
Fix drawing deformers in UI, there are than 9 subSystems assigned to object,
Better algorithm for picking UV box under cursor, when multiple UV Regions are overlapping,
Simplified Track To, Curls Deformers,
Added Simple Curve Mapping input mask type,
Fix Curve Profile - bad uvs, when using curves with Vector type handles,
Refactor of Hair Tool hotkeys handling,\n - new curve Root modeling transformation mode,
Added collisions support for 'Hair Modeling' tool in IK mode (chain),
'Hair Modeling' workspace tool can be now used in curves sculpt mode,
Hair Profile, from now will have first row of edges marked as creased - thus can be used as 'Grid Guide' for another Hair System,
Added more presets for baking in 'Hair Baking Scene',
Updated and added new presets to Hair presets Library,

Update 3.6.0 for Blender 3.6, 4.0, (date 14.1.2024),

Multiple directories locations can be added HTool addon Preferences > Library),
improved creation and matching of hair library presets to yo,

Update 3.6.3 for Blender 3.6, 4.0, 4.1, Last update 27.03.2024,

Compatibility fixes for Blender 4.1,
remade 'Flatten UV', to work on new hair curves (Particle Hair are no longer supported),
optimizations in strands generation,
Added 'Random Parent' bake pass in baking scene,
keymap refactored,
Fix - adjusting radius, on new hair curves not working,
Duplicate will now work on partially selected curve points,
New 'Haircard to Mesh Loop' operator,for converting haircards to mesh strip, and then > Curves,
Added 'Viewport Display' input mask - useful e.g. for reducing strands density in 3D view,
Fixed wrong Profile results, when using Profile: UV Taper + Width From UV,
Strand Generator - added 'Mask' input,
FIX: restored missing hotkey (ctrl+D) for 'Linear Deformer' tool,
'Linear Deformer' will no longer move hair roots,
'System Color' deformer has 'Use HSV Sliders' option now,
Added icons for different Hair System types: Strand Generator, Filter, Curves From Grid Surface,

Update 3.6.6 for Blender 3.6, 4.0, 4.1, 4.2 Last update 17.07.2024,

Compatibility fixes for Blender 4.2 ,
Remade 'Bone Generation' and 'Mesh to Strips' - to work even on non quad topology (should be more useful when working with cards made in outside programs),
'Short Hair' - change operator poll function, to make it easier to add Short Hair on old Hair object,
Fix 'Mesh Profile' not reading 'SystemColor' attribute correctly, when using 'Use HSV Sliders',
Fix 'Instance' deformer - when using it to instance another hair object (UVs were missing),
Added 'Search Deformer' operator under Deformers popup menu,
hair baking fixes,
Fix error when trying to set UV color, when UV palette does not exist,
Added option to transfer shape from Hair Curves to Mesh - from hair Data tab > Shapekey panel 'Transfer Shape Keys',
Added Non-uniform Spacing option for Curls Profile type,
Safer cleanup after failed 'UV Define' operator,

for Blender 3.6, 4.0, 4.1, 4.2 Last update 23.08.2024,

Added update button to get latest HTool 4.0 beta (only for Blender 4.2+, but still compatible with 'old' HTool 3.6.x),
hair roots stay pinned when moving source mesh and using 'Track to Mesh/Curve' deformers,
Fix flat braids - expose 'flatten' property,
added toggle option 'Ignore Wire Objects' in 'Finalize Hair' - thus object drawn as wireframe can be skipped,
Ease out conditions for 'Flatten UV' and 'Shape Keys Transfer'
Allow to 'Transfer Hair' from Curve Hair to Mesh,
'Influence Range' inputs are collapsible now (thx. MeeWa),
You can grab UV boxes with G key (thx. MeeWa) and Scale with S (set color was remapped from [S] to '[W]rite Color' key),
Flat Profile has now 'Influence Roundness' input mask (thx. MeeWa),
Added 'Influence Range' input mask to 'Align Tilt' deformer,
Fix relative file path baking error,
Fix UVs becoming broken (no visible texture on cards), after importing baking scene,

Update 4.0 for Blender 4.2+ (still as add-on) Last update 26.09.2024,

Added multiple profile types/objects support within one hair object - using 'Mesh Profile' and 'Multi Curve Profile' types,
Added 'Profile Distribute' deformer - for assigning profile objects to strands,
Show Child-Parent Hair Systems relations in UI (as tree like structure),
More stable Physics Sim (still not perfect yet..),
Improved 'Curves from Grid Surface', with new 'Hook First Segment' option,
Added symmetry option for Hair Tool modeling tools,
Bisect option in 'Mirror' deformer will work now when using custom symmetry object,
New 'Interpolated Strands' hair system type and operator,
'Influence Range' inputs are collapsible now (thx. MeeWa),
You can grab UV boxes with G key (thx. MeeWa) and Scale with S (set color was remapped from [S] to '[W]rite Color' key),
Flat Profile has now 'Influence Roundness' input mask (thx. MeeWa),
Added 'Influence Range' input mask to 'Align Tilt' deformer,
Fix relative file path baking error,
Fix UVs becoming broken (no visible texture on cards), after importing baking scene,
Added new hair bake preset (thx Ellimoren),
Fix Random ID and Random Color bakes passes (previously changing contrast would randomize strands color),
improve 'Align Tilt To border' (tilt was not accumulated correctly),
Improve Strand Selection tools (add select by points count option),
Strand Group IDs will be inherited from parents strands,
Added 'Assign Group ID' deformer,
Skip generating 'Surface Deform' on Hair System Bake,
Improved 'Align Tilt' in some corner cases,
New 'Radius' input mask,

Update 4.0.2 for Blender 4.2+ Last update 16.10.2024,

Fix: new duplicate of 'Hair Tool' library entry created on each Blender launch,
Fix: adding or moving hair systems, could cause 'Missing Deformers' errors,
Added 'Fix missing deformers' operator for fixing already broken setups (from bug above),
Shift + RMB will deselect already selected point when using HTool modeling tools
Added option to mask 'Physics' deformer,
Added 'Inertia' input to Physics deformer (low Inertia - hair will follow mesh deformations easier - they will feel very light)

Update 4.1.1 for Blender 4.2+ Last update 20.11.2024, thanks to MeeWa for implementing these changes

General

Added: Backup system for influence remap nodes and profiles,
Added: Auto assign current hair material on mesh or curves objects if Shader Editor is in window space to visualize node tree,
Added: Ability to modify all hair system settings when target object for 'Track to' deformer is selected,
Added: new Hair Object list Panel in Hair System panel, which is give ability to see list of hair objects linked to active surface object and modify their settings without switching directly,
Added: Added export feature to convert and export all selected objects (including simple old curve objects) to defined location with one button,
Added: Target object for 'Track to' deformer now can hide/show by pressing eye icon located to the right side of Target row,
Added: Target object for 'Track to' deformer can be selecting by pressing 'Target:' label,
Modified: When calling 'Hair with Track Mesh' operator, you can now interactively change offset,
Modified: 'Convert to Mesh' now also unlink grid_surface and target object for 'Track to' deformer and restore them after,
Fixed: Some node remained in node graph after switching influence mode,
Fixed: 'Taper Curve' operator reset ending points to 0 and 1 from curve graph after next call of popup window,
Fixed: Adding hair system on mesh which is set as surface for another hair curve object cause a visual bug with hiding source mesh,
Fixed: Hair modeling tool warning on registering for SCULPT_HAIR mode: 'could not find 'after' {'builtin_brush.Slide'}',
Fixed: Crash after undo hair system or Hair from grid surface creation,
Fixed: Crash after undo make unique hair system,
Removed: Duplicated Material/UV panel in Hair Operators,

BackupSystem,

new: Now values for profile and influence inputs are saved into object property and restore after switching,
new: Add reset to default Icon button for profiles. For influence nodes now perfectly working builtin reseter with Backslash hotkey while hovering value,

HairObject List Panel,

new: Panel with list of hair objects belonging to the same surface, which allows you to see all connected hairs and adjust hair system settings for each of them without switching object in view-port,
Fully synchronize with Outliner. Could change name and sort by object name,
new: Active hair object could switch in the view-port by pressing 'CURVES' icon on the panel without changing context mode,

Export Hair,

new: Now users can defined manually export path and filename in N panel or just press Export button and call the exporter window where you can adjust properties,
new: Storing previous properties for exporting and the next time you press, the export will happen immediately. If hold shift exporter window is appear,
new: Leave only the most important properties to change. Not testing with rigs, only for static meshes,

UVs,

Added: Duplicate hovered uv box in UV Editor with shortcut Shift+D,
Added: Draw alpha texture if exists as background on uv region selection in object mode with T hotkey, Shift+Wheel to change opacity,
Added: Show alpha texture if exist in UV Editor when calling UV Define operator,
Modified: Assign X hotkey to also delete hovered uv box,
Modified: Change position for select UV tooltip box to not overlap uv boxes with texts,
Modified: Reduce number of horizontal lines for UV boxes depending of island size, was too dense for really small uv islands. Hide also IDs labels for the same reason,

Short Hair,

Added: Ability to modify short hair settings when guide object is selected,
Added: Add icon button on panel to randomize seed values for some properties (Noise, Rotation, Length) when their values differ from 0,
Modified: UV selection in viewport for short hair like for hair system,
Modified: Now properties name get from geonode directly,
Modified: Modify UV layer UIList panel in visual aspects,
Modified: Add seed property for uv distribution, unique for every uv layer,
Modified: Add ability to unhide Guide Object by holding down Shift when pressing Toggle Guide Object operator,
Fixed: Toggle Guide Object operator raise an Error,
Fixed: Error when try to set up UVs if there are multiple uv layers,
Fixed: Short hair parameters not visible in edit mode,

Workspace Tool,

Added: Flip UV (in W menu) for selected strands,
Added: Hide unselected curves with Shift+H shortcut,
Added: Shortcut Alt+1 to toggle Active root or tip selection,
Modified: Move attribute panel to right side in pie menu for baked hair and add Set UV Regions to left side,
Modified: Add Ctrl+X to delete immediately selected spline in Sculpt Mode without calling enum menu,
Modified: Add dependency from view-port clip start parameter to prevent disappearing tips drawing on very close distance for objects with small scale

Update 4.1.3 Blender 4.2+ Last update 5.2.2025,

Hair modeling tool - when using in Normal(FK) mode - 'Pin' button will prevent hair roots from moving,
Hair modeling tool - when using in 'Root' mode - 'Pin' button will slide moved strands on top of source surface,\n - Linear Deformer - bend is way faster now (and works properly with symmetry),
Added 'Symmetrize' operator - only for Blender 4.3+,
Fixes for when using old profile (node setups) with new Hair Tool (fixes missing UVs),
New operator for toggling profile object preview (or selection) for multi profile objects (makes it easier to identify profile sub-object),
Hair drawing operator should be way faster now on heavy meshes,
Hair drawing - uses nicer simplification method - it should give more uniform/smoother points distribution,
Hair Modeling should also be way faster now is you use snapping (snapping cache is done only once on tool initialization),
'Hair modeling' - snapping has now option to use mesh 'with modifiers' as snap target,
Added option to tile UVs (in U direction) for Braid Profile,
Added option to project root verts to base mesh - helps to snap hair-card nicely to character head,
Fix: missing snap cache after double undo (in hair modeling),
Added option to use collection to fill all objects slots in Multi Profile,
Add more checks for validity of hair root, when using 'Prepare Hair Preset' operator,
restore 'Import Shell Hair Material' button into HTool Ctrl+Shift+H pie menu,
'Strands Overlay' supports coloring of hair groups. Also it will render faster and few bugs were fixed,
Randomize mask - no longer clamps values above 1,
Fix: HTool modeling would override [CTRL] brush key - and then not restore it properly,
Added new Strand Simplify deformer (based on modified Visvalingam–Whyatt algorithm),
Fixed Regressions: being unable to select root, hair tips adjacent edges - not being colored with selected color,
Fix: incorrect domain of strands group attribute was generated in interpolate node,
Added UV Data operators: cleanup unused, copy to selected,
Added option to copy Profilee/Hair System from active object to other selected objects,
Fix - prevent Blender freezing when Hair System is set as its own parent (prevent cyclic dependency),
Toggling active end (in Hair Modeling) will keep the strand selection now,
Generate Curves from UV - prevent linking generated profile curves to scene twice,
Added new Hair System type: 'Strands on Mesh Parts' - which will allow to spawn strands om mesh Vertices, Edges or/and Faces,
Bring back the performance for 'Curves from grid' (100x faster now), and it handles vert group mask ok now too,
Generate AO' - will add AO modifier to all selected object now (not just active like in past),
'Flip Back-facing Cards' is now built-in into HTool (on bottom of Ctrl+Shift+H pie),
'Strand Overlay' width is customizable now,

Update: 4.1.4 for Blender 4.2+ Last update 27.2.2025,

Add support of individual roundness for Flat Profile per strand,
Add ability to create texture/vertex group from input masks,
Add button for editing 'input mask' masks (switch to: texture, vertex group edit mode),
Add ability to switch in Sculpt or Edit mode for guide mesh or curve in 'Track To' modifier,
UI: boolean inputs will show description in toolips now (captured from geonode input),
UVs: you can show/hide help overlay with 'H' shortcut (for 'UV Define' and 'Set UV Region' operators),
UVs: Modified: Now drawing area for 'Set UV Region' and 'Define UV' operators rely to area region size and not overlap with Blender UI elements,
UVs: ignore 0 size UVs when drawing new UV Boxes in 'UV Define' operator,
Short Hair: Add ability to Draw weight paint or create new vertex group for UV region in Short Hair,
Short Hair: Add ability to switch in Sculpt or Edit mode for guide mesh,
Short Hair: Add ability to switch in Weight Paint mode to paint vertex group input,
Workspace Tool: Add Smooth curve operators to W context menu,
Workspace Tool: fixed disappearing 'Strands overlay' in Orthographic View,
Fix 'Interpolate Strands' operator not working,
Fix (breaking change): hair UVs randomized on e.g. Hair Split (refactor of how strands UV_Box_ID attribute works),
Fix (breaking change): Adjusted behavior of how MultiProfile works - to match new UVs workflow/behavior,
Fix: incorrect drawing of Hair Tips overlay (wrong matrix),
Improve tilt aligning algorithm for 'Curls deformer',
make Braid UV tiling size customizable (with random offset option),
resample - add: 'Short count bias' parameter,

Update: 4.1.5 for Blender 4.2+ Last update 31.3.2025,

Braids add: Roundness, Radius Skewing, Periodic Tilt controls,
Braids more descriptive input names,
Circle Profile: add roundness, bevel, flatness control,
New: Strands from Profile (as guide),
New Align Tilt (using Free mode),
New: Track To Curves has cornrows option now,
Fix: operations on Hair Systems could not work if there was broken setup somewhere on scene (fix by finding and repairing these broken setups),
Fix: restore 'Duplicate Strands' (my bad: removed node setup by accident),
added: Ctrl+Shift+H > 'Sample Mesh normal's' - for blending cards roots normal's,
Strands Drawing: when using 'Adaptive' resampling, make reduction independent of spline size/length (prevents very short strands being reduced to 2 points),
New: Strand Generator: On Mesh Border,
Updated TrackTo deformers (Bend Target can be moved between Root-Tip),
Updated descriptions for Boolean inputs (they have tool-tips now - thx MeeWa),
New Deformer: Generate Strands of Strands (for feathers, eyelashes? not sure how useful it is yet),
fix missing gizmo (due B 4.4 api change),
Refactor keymaps handling (HTool keys should not longer disappear),
Fix switching active hair object would not work sometimes (usually when loading broken hair blend file),

Update: 4.1.6 for Blender 4.2+ Last update 7.4.2025,

Strand Generator has now 'Relax' option - to even out distribution of generated points,
Update Default Hair Material - textured Root/Tip Gradient,
Hair Baking scene has improved beard preset,
Fix: unable to UV 'Short Hair' regression,
Added: 'Paste as New Deformer' (previously it was only possible to paste on top of existing deformer - to override it),
Refactor how Noise deformer works (properly handle frequency input mapping, expse noise offset). Updating this node, will change how your old hair noise looks like!,

Update: 4.2.0 - for Blender 4.2+ Last update 30.4.2025,,

Added Flatten option to clumps,
Updated Default Hair Texture (more variation in strand length and sizes),
Updated Hair Baking setup,
Added option to store Deformer presets,
Added option to reset hair UV to the default layout (new default UV layout for new Hair Texture in HT 4.2.0),
New: added 'Push out Along Normal' deformer,
Added option to paste hair system as new System (previously paste could only override active HSystem),
Fix errors in how Hair Systems tree structure is calculated in UI (sometimes indents in HSys list were wrong),
Fix: Curves From Grids - could give bad results when grid mesh was split with 'Split Edge' modifier,
Added BiDirectional influence range input mask,
Fix strands overlay drawing on undo-redo,
Switching Hair System type is done in Deformers menu now (fist deformer -strand generator has to be selected),
Updated Noise Deformer: it correctly handles frequency mapping now (e.g. when Frequency input is masked with Influence Range mask), added Vector Offset parameters - for both Uniform and Per Strand noise for precise noise adjustment,
Strands from Grid has new 'use Count as Density' option - it helps to give uniform strands density, when same hair system is attached to multiple Grid Guides - with different lengths,
Strands 'remember' now mesh island ID from which they were spawned from - this way strands spawned on border between two mesh islands will behave nicer when using e.g. Track To deformers,
Added: option to store (single or multiple) Hair System presets,
Generated Multi Profile cards are now distributed in both X an Z axes,
Fix: Project Roots modifier (limit projection range, and fix the algorithm),
Added new strand generator: 'Prism Mesh Guide',

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