Textures

python3 portrait/texture.py irises "ice blue with silver flecks"
python3 portrait/texture.py bra "black lace with a pink trim" --count 4
> "Luna, give me three violet iris options."

New textures for her 3D model from UV templates, generated by your own ComfyUI. A template says where on the texture a part lives (a bra's cups and straps, the two eye circles); the script turns it into a mask, has ComfyUI paint the part, and puts the result back at exactly the template's size, everything outside the part transparent. Load it in VRoid's texture editor as a new layer and it lands in the right place.

It works with any checkpoint ComfyUI has; the default is waiIllustriousSDXL_v170.safetensors. Results go to ~/luna-textures/ (or $LUNA_TEXTURES), named after the part, time and seed.

Three ways to fill a part

Mode	What it does	Good for
fill	Generates a material and clips it to the shape. Long thin shapes get one square tile, mirror-tiled, so the pattern isn't stretched	Fabric, lace, latex, prints
stamp	Generates one picture and puts a copy in every separate island of the template	Irises: one eye, both circles
inpaint	Repaints just the shape on top of a base texture (--base), so it blends with what's there	Skin details, panels, wear, decals

Flat things work best: materials, patterns, irises, decals. Anything that has to line up across UV seams or follow the 3D shape is harder, because the model can't see how the UV map is stretched.

Presets

Each part is a preset in portrait/textures/presets.json, with its template in portrait/textures/templates/. Adding a part means adding a template and a few lines, no code:

"irises": {
  "about": "VRoid eye irises: one iris, stamped into both circles",
  "template": "irises.png", "paint": "transparent", "mode": "stamp", "mirror": true,
  "prompt": "anime eye iris, front view, centered, perfectly circular, flat, {you}"
}

Key	What it does
template	The template file
paint	Which part of the template is the part: opaque (VRoid's clothing templates: the shape in solid black on transparency), transparent (VRoid's eye template: circles cut out of black), or black / white for plain images
mode	fill, stamp or inpaint
prompt	Words around yours; {you} marks where yours go
mirror	stamp only: mirror every other copy, so the two eyes face each other
checkpoint, steps, cfg, sampler, scheduler, negative	Generation settings. Defaults suit Illustrious-style SDXL models: 28 steps, cfg 5.5, euler_ancestral
denoise	inpaint only: how much of the base to change, 0-1
feather	Pixels of soft edge on the mask
close	Pixels of guide lines to paint over (the eye template's wireframe)

python3 portrait/texture.py list shows them. Any template works without a preset too:

python3 portrait/texture.py --template shirt.png --paint opaque fill "red tartan"
python3 portrait/texture.py skin "subtle freckles" --base body.png    # an inpaint preset of your own

Other options: --count N, --seed N (the same seed gives the same result), --checkpoint, --steps, --cfg, --denoise, --comfy http://host:8188, --out folder.

From Luna

While ComfyUI is answering, she has a make_texture tool: name the part and say what you want, and she makes up to four versions and tells you where they are. Your own turns only; stream chat never gets it.

"comfyui": { "url": "http://127.0.0.1:8188" }

The templates

The three that ship (bra, panties, irises) are VRoid Studio's texture templates. Export more from VRoid's texture editor (each item's template image) and drop them in portrait/textures/templates/.

Needs Pillow (pip install pillow, or the installer's portrait extra). Everything else happens in ComfyUI.