PLAYTEX AI — Equirectangular vs Cubemap evidence pack

This pack contains one 2048 × 1024 display-referred panorama and the six 512 px PNG faces produced from it with the same projection core used by the PLAYTEX AI converter.

Three.js CubeTextureLoader order:
px.png, nx.png, py.png, ny.png, pz.png, nz.png

Important limits:
- Projection conversion changes pixel layout; it does not create HDR dynamic range.
- The included PNG source and faces are visual QA evidence, not a calibrated light probe.
- Face naming, handedness, rotation, color space, mip behavior, and seam filtering must be verified in the target engine and version.
- The 75% pixel figure assumes a 512 px face from a 2048 px-wide panorama, matching angular density at the panorama equator and each face center.

Reviewed: 2026-08-30
