Claude (auto-RE) 671891f9bf re: XPR2 channel order confirmed against the running game -- the second "dynamic unknown" closed ...

INDEX carried XPR2 as "colours unverified (dynamic item)". The failure mode that
matters is a swapped red/blue channel: invisible on greys, invisible without
ground truth, and it poisons every asset silently.

Method: pick an asset that is strongly asymmetric in hue and has known in-game
appearance. DeltaSaber_T.xpr (1024x1024 Dxt1, 11 mips) decodes to white/grey
panels with orange-rust accents; the game renders the same hull in the ARSENAL
scene.

  decoded texture : 1073 warm px, 0 cool, median saturated hue 23.3 deg
  in-game render  :  916 warm px, 124 cool, median saturated hue  9.3 deg

Both orange/red; a red<->blue swap would put the texture at ~200 deg. The cool
pixels are the blue UI behind the model and the 14 deg offset is the hangar's
red key light -- neither can move a hue by 180.

Stated as a bounded result, not "colours are correct": a hue-family comparison
cannot see a gamma/sRGB error, premultiplied alpha, or a per-channel scale, so
exact fidelity stays open and needs a flat unlit known-value surface. Cubemap
face ordering untouched. BG_Earth.xpr (A8R8G8B8 cubemap face) decoding to a
coherent nebula is corroboration for the de-tile step, not proof.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

2026-08-11 21:21:55 +00:00

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