CLASS bpp
CLASS bpp$a
FIELD a WORLD_SURFACE_WG Lbpp$a;
FIELD b OCEAN_FLOOR_WG Lbpp$a;
FIELD c LIGHT_BLOCKING Lbpp$a;
FIELD d MOTION_BLOCKING Lbpp$a;
FIELD e MOTION_BLOCKING_NO_LEAVES Lbpp$a;
FIELD f OCEAN_FLOOR Lbpp$a;
FIELD g WORLD_SURFACE Lbpp$a;