Fur Grooming Tool

A Unity editor tool for authoring liltoon fur textures by painting over a UV layout. Three modes share one window and one UV background:

Mode	What you paint	Output	liltoon slot (default, editable)
Direction	Fur flow + tilt strength	Tangent-space normal map	_FurVectorTex (or _BumpMap)
Length	Soft / gradient grayscale	Fur length mask	_FurLengthMask
Alpha	Hard black / white	Fur presence mask	_FurMask

This is a local Unity package, so one copy can be added to any number of projects.

Install

1. Place this package folder somewhere stable (keeping it outside your projects is fine).
2. In the target project: Window ▸ Package Manager.
3. Click + (top-left) ▸ Add package from disk…
4. Select the package.json inside this folder.

Unity records it in that project’s Packages/manifest.json as a file: reference. Repeat per project. Keep the folder where it is — moving it breaks the reference.

Open the tool from the menu: Tools ▸ Fur Grooming Tool.

Workflow

1. Drag your UV-layout snapshot into Background.
2. (Optional) drag the avatar’s liltoon material into Target material to auto-assign maps on save.
3. Pick a tab and paint:
   • Left-drag paints. Right-drag paints black / erases. Scroll to zoom (cursor-anchored). Middle-drag to pan.
   • Direction — drag to comb. Pinch converges a tuft to a point; Direction / Strength / Erase edit one channel.
   • Length — Paint (soft, builds gradients via flow + hardness), Smudge (melts edges smooth), Gradient (drag a line for a root→tip ramp). Smooth all blurs the whole mask.
   • Alpha — Paint white / Paint black hard brushes, Fill white / Fill black, Threshold + soft-edge toggle for crisp cutouts (paw pads, under clothing).
4. Symmetry — paint one side, choose the Mirror direction + axis, then Apply mirror to copy it across. Direction vectors are flipped correctly across the axis.
5. Save … map (green button) writes a PNG into /Assets with the correct import settings (Normal map / linear grayscale, sRGB off) and assigns it to the material property if one is set.
6. Save groom / Load groom (Direction tab) stores all three layers in a groom file (.bytes) so you can resume later.

Notes

• Green channel: Flip G (Unity/OpenGL) is on by default (correct for Unity/liltoon). If fur lighting looks inverted, flip it and regenerate.
• liltoon keywords: assigning to _BumpMap also sets _UseBumpMap, but you may still need to tick Normal Map once in the liltoon inspector. For fur, enable the fur preset and point _FurVectorTex / _FurLengthMask / _FurMask at the outputs.
• Property names are all editable in the UI, so the tool also works with other shaders.

License

Provided as-is, with no warranty. Free to use, modify, and redistribute.