testsAndMisc/python_pkg/artgate/styles/pixel_icon.toml
Krzysztof kuhy Rudnicki e6e0ba5ab3
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artgate: diffusion + 3D routes, full vector coverage, and the margin gate
Closes the remaining bake-off cells. The phase's real result was not a route
score but a MISSING GATE.

All twelve SDXL icons measured 100% opaque coverage -- square tiles with no
sprite silhouette -- and passed every gate in the harness. Gate-pass was
measuring pipeline hygiene, not usability. MARGIN_TOO_SMALL inverts the table
from a meaningless 12/12/12 tie to:

    diffusion   0/12      (every output full-bleed)
    vector     10/12
    procedural 11/12

The two non-diffusion failures were true positives in MY shapes, not gate
error: the procedural sword pommel ran off the bottom edge and the vector meat
bone clipped the top. Both fixed; both routes back to 12/12.

Diffusion recovers to 12/12 with flood-fill background removal, but visual
inspection shows the fill eats into the art (bone reduced to a fragment, sword
nearly erased). Reported as inadequate rather than shipped -- proper matting is
needed before route (b) is a usable pipeline.

Blender exits 0 even when its embedded script raises: BLENDER_EEVEE_NEXT does
not exist in 5.2, and the failure produced a clean exit and no file. render()
now asserts the output exists, or the route would report phantom successes.

Model gating verified at execution time, never recalled: SDXL base and
nerijs/pixel-art-xl are ungated, FLUX.1-dev is gated=auto, and
runwayml/stable-diffusion-v1-5 now 307-redirects.

The finishing stage now generalises across three continuous-tone sources
(SVG raster, Blender render, SDXL): each is 0/N raw and N/N finished.

Verified: 114 tests, 100% branch coverage on 13 modules, zero suppressions,
all hooks pass. Note: a local pytest run masked a missing branch that the
pre-commit hook caught -- the hook's run is authoritative.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T9rQ12yZ7sJxiPQTCS5dUF
2026-08-15 22:51:31 +02:00

35 lines
1.4 KiB
TOML

# Pixel-art item icon: the most machine-checkable style, and the one where
# "AI slop" is most detectable.
#
# CALIBRATION (measured, not guessed) over 250 genuine 32x32 CC0 icons from
# ~/opengameart-downloads:
# p50=7 p75=10 p90=13 p95=14 p99=26 max=30
# Rejection rate of real hand-made art by cap:
# cap 16 -> 3.6% cap 24 -> 1.2% cap 32 -> 0.0%
#
# A first attempt at 16 rejected a real DCSS rambutan icon (18 colours, clean
# binary alpha). That is the "the threshold was wrong, not the art" failure the
# seamless-tilesets skill documents, so the cap was re-derived from the corpus
# rather than nudged until one file passed. 32 admits all observed hand-made
# art while still rejecting un-quantized generator output by a wide margin
# (a raw diffusion sample measured 34403 colours before its finishing stage).
name = "pixel_icon"
canvas = [32, 32]
max_colors = 32
alpha_binary = true
min_margin = 1
# ALPHA_NOT_BINARY is listed first because ordering is load-bearing: a
# soft-alpha image has no fully-opaque pixels, so the colour gate would
# otherwise count zero and pass. See pixels.py module docstring.
# NO_OPAQUE_PIXELS is deliberately absent: it is a result code emitted by the
# colour/palette gates when they fail closed, not a gate you can request.
gates = [
"ALPHA_NOT_BINARY",
"TOO_MANY_COLORS",
"CANVAS_SIZE",
"SCALE_NOT_INVARIANT",
"SILHOUETTE_LOW_CONTRAST",
"MARGIN_TOO_SMALL",
]