# Static hand sprite atlas The runtime hand colors are not baked into these images. Draw `hands-outer-mask.png` with the face primary color, then draw `hands-inner-mask.png` at the same position with the face secondary color. The UI manifests use Moddable's supported `*-alpha-monochrome` resource target so both masks stay compact one-bit alpha textures while retaining their PNG resource names at the Piu API boundary. Both atlases are 704 x 880 pixels and use 88 x 88 pixel cells. The artwork still has a maximum 76-pixel extent; the smaller cells only remove transparent padding and do not scale the hands at runtime. Columns, from left to right: 1. up 2. up-right 3. right 4. down-right 5. down 6. down-left 7. left 8. up-left Rows, from top to bottom: 1. right fist 2. right point 3. right peace 4. right open 5. right side-open 6. left fist 7. left point 8. left peace 9. left open 10. left side-open `hands-source-right.png` is the five-row authoring sheet assembled from the built-in image generation results. `hands-source-right-alpha.png` is the same five-row source after chroma-key removal. The side-open artwork was generated separately, then appended as row 5 so source rows and runtime state rows use the same order. The left-hand rows are generated from the right-hand rows. The direction is remapped before mirroring so that, for example, both `right/up-right` and `left/up-right` still gesture toward the upper right. Regenerate the masks and preview with: ```sh python "${CODEX_HOME:-$HOME/.codex}/skills/.system/imagegen/scripts/remove_chroma_key.py" \ --input host/modules/ui/components/hands/assets/hands-source-right.png \ --out host/modules/ui/components/hands/assets/hands-source-right-alpha.png \ --auto-key border \ --soft-matte \ --transparent-threshold 12 \ --opaque-threshold 220 \ --despill \ --force python host/modules/ui/components/hands/tools/build-static-atlas.py \ host/modules/ui/components/hands/assets/hands-source-right-alpha.png \ host/modules/ui/components/hands/assets ``` The source generation prompt is recorded in `generation-prompt.md`.