Oblivion Mod:Mod File Format/CELL

A CELL record defines a cell. Interior cells are defined in the CELL group while exterior cells are defined in the WRLD group. The CELL record is followed by a group containing the references for the cell.

Persistent references are defined in the 'persistent children' subgroup while temporary references are defined in the 'temporary children' subgroup. Visible when distant references are defined in the 'visible distant' subgroup.

For an exterior cell, the persistent references are defined in a dummy cell in the worldspace group. The visible when distant and temporary references are then defined within exterior block/subblock groups. The 'visible distant' subgroup must occur before the 'temporary children' subgroup for a cell, otherwise the distant objects will not be rendered by the game engine.

For an interior cell, the persistent and temporary references are defined in interior block/subblock groups. The 'persistent children' subgroup must occur before the 'temporary children' subgroup.

The block and subblock groups for an interior cell are determined by the last two decimal digits of the lower 3 bytes of the cell form ID (the modindex is not included in the calculation). For example, for form ID 0x000CF2=3314, the block is 4 and the subblock is 1.

The block and subblock groups for an exterior cell are determined by the X-Y coordinates of the cell. Each block contains 16 subblocks (4x4) and each subblock contains 64 cells (8x8). So each block contains 1024 cells (32x32).

Subrecord	Type	Info
EDID	zstring	Cell editor ID
FULL	zstring	Cell name
DATA	ubyte[1]	Flags 0x01 = Can't travel from here 0x02 = Has water 0x08 = Force hide land (exterior cell), Oblivion interior (interior cell) 0x20 = Public place 0x40 = Hand changed 0x80 = Behave like exterior
XCLL	struct	Lighting (only used for interior cells)
XCMT	ubyte[1]	Music type if not default type 0x01 = Public 0x02 = Dungeon
XOWN	formid	Owner (NPC or Faction)
XGLB	formid	Global variable (if owner is NPC)
XRNK	long	Faction rank (if owner is faction)
XCCM	formid	Climate (if interior cell behaves like exterior cell)
XCWT	formid	Water
XCLW	float	Water height (if not 0.00)
XCLR	formid[*]	Regions containing the cell
XCLC	long[2]	(X, Y) grid (only used for exterior cells)