- gemini-3-5-flash: ATLAS_COORDS and the canvas tiles share a top-origin
row convention, but default flipY=true mirrored sampling (row r read
row 3-r): grass tops became purple crystal, sides hit the alpha-holed
portal/leaves tiles (the "transparent blocks"). flipY=false, 1 line.
- gpt-5-5-xhigh: movement Z component sign-flipped against the -Z
camera convention, mirroring all motion across the X axis (A/D
swapped facing +-X). Negated Z, 1 line.
Run notes now carry full provenance: GPT-5.5 Pro Extended Pro, Codex
CLI (no skills) for xhigh, AntiGravity high for both Geminis, and the
local Grok Build TUI.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
