v1.2.30

bzo@1.2.30 changelog:extract
node scripts/extract-changelog.mjs v1.2.30

[1.2.30] - 2026-09-18

Added

• Maps can now set a custom ground texture (-gndtex), matching
  upstream. A map's options block may state -gndtex <name>, or an
  explicit material name GroundMaterial ... end block, either a stock
  texture name or an external URL, the same as any other material. The
  ground plane textures and tints from it, falling back to the stock
  std_ground checkerboard when a map states neither. hix.bzw's ground
  now matches its own box/octagon/walkway tops via matref concrete. See
  "Ground texture" in docs/bzw.md.