Sector Type

SECT_INSIDE	0	Uses as if walking indoors
SECT_CITY	1	Uses as if walking in a city
SECT_FIELD	2	Uses as if walking in a field
SECT_FOREST	3	Uses as if walking in a forest
SECT_HILLS	4	Uses as if walking in hills
SECT_MOUNTAIN	5	Uses as if climbing in mountains
SECT_WATER_SWIM	6	Uses as if swimming
SECT_WATER_NOSWIM	7	Impossible to swim water - requires a boat
SECT_NO_GROUND	8	Must be flying/levitating
SECT_UNDERWATER	9	Need water breathing here
SECT_UNDERWATER_GR	10	Underwater, on the bottom, can bash
SECT_FIREPLANE	11	Used in the elemental plane of fire.
SECT_OCEAN	12	Use if in the ocean or vast seas only!
SECT_UNDRWLD_WILD	13	[underworld flags: intended to be used for
SECT_UNDRWLD_CITY	14	underground settings; drow, duergars, mind
SECT_UNDRWLD_INSIDE	15	flayers, etc]
SECT_UNDRWLD_WATER	16
SECT_UNDRWLD_NOSWIM	17
SECT_UNDRWLD_NOGROUND	18
SECT_AIR_PLANE	19	Used in Elemental Plane of Air
SECT_WATER_PLANE	20	Used in Elemental Plane of Water
SECT_EARTH_PLANE	21	Used in Elemental Plane of Earth
SECT_ETHEREAL	22	Used in Ethereal Plane
SECT_ASTRAL	23	Used in Astral Plane
SECT_ICE_PLANE	24	Used in Elemental Plane of Ice
SECT_UD_UNDERWATER	25	Underworld Underwater
SECT_UD_UNDERWATER_GR	26	Underworld Underwater with Ground
SECT_SMOKE_PLANE	30	Used in the Plane of Smoke
SECT_ICE_PLANE	33	Used in the Plane of Ice (need prot cold or take damage)
SECT_FREEZING_WATER	34	Need both prot cold AND waterbreathing

Sector type determines the number of movement points used up.