+ u32 spflags = 0;
+ s16 ground_level = 8;
+ s16 large_cave_depth = -33;
+ s16 lava_depth = -256;
+ float cave_width = 0.09f;
+ float lake_threshold = -0.45f;
+ float lake_steepness = 48.0f;
+ float hill_threshold = 0.45f;
+ float hill_steepness = 64.0f;