world: prove undecorated base terrain bit-exact against vanilla

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TestVanillaBaseTerrainParity compares our noise+surface+carver+aquifer+
vein pipeline against a vanilla capture whose biomes carry no features
and no structure sets: all 393,216 cells match. The plain-state fixture
mismatches the base-terrain diagnostic used to attribute to carver or
aquifer defects are therefore feature outputs wearing plain states —
monster-room cave_air, geode voids, lava-lake lava — and its doc comment
now says so.

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Daniar Mannanov 2026-08-26 02:06:00 +03:00

parent f150d2e717

commit f0a7cf815d

3 changed files with 190 additions and 13 deletions

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