Anchored on full (iter 27400, paper baseline).
Protocol: cmd_vx = ±1.0, 20s episodes, single pit, pit_depth cap 0.72 m,
stone_distance cap 0.58 m, illegal_contact disabled, 2000 envs × 13 sub-terrains × 30 rows.
Excluded from filtered metrics: hurdle_pole, hurdle_board, boxes, random_rough.
Full terrain cfg in baseline_terrain_config.json.