Skyrim Mod:Mod File Format/ARMA

ARMA records contain armature data, which is how armor (or similar) is displayed on a model. These also contain information on bare (ie unarmored) models, presumably combined with specific armor/addons. For creatures, this can be potentially only 1 record.

Each record has the potential for gender-separated models, as well as 1st person vs. 3rd person and also a list of races that this qualifies for.

If MOD3 is not present, MOD2 is both genders, if MOD3 is present then MOD2 is only male. If MOD4 is not present, MOD2/3 are all viewpoints, if MOD4 is present, then MOD2/3 are specifically 3rd person while 4/5 are 1st person.

A similar distinction exists with NAM0-3 (base texture) eg NAM0 = male, 3rd person, NAM2 = male, 1st person

Note: there are some with only MOD2/4 or MOD3/5 for gender-specific models as well (eg Astrid)

C	Version	SubRecord	Name	Type/Size	Info
+		EDID	editorId	zstring	Editor id
+	pre 1.6.91	BODT	Body Template	BODT	12-byte struct Body Template. Appears to be mutually exclusive with BOD2.
+	1.6.91	BOD2	Body Template	BOD2	8-byte struct Body Template. Appears to be mutually exclusive with BODT.
+		RNAM	"primary" race	formid	RACE note: there is no preference given for races listed but must have at least this 1.
+		DNAM	unknown	struct	12 bytes uint8 - Male Priority uint8 - Female Priority uint32 - Unknown uint8 - Detection Sound Value uint8 - Unknown float - Weapon Adjust
+		MOD2	model	zstring	Models\ relative .nif
-		MO2T	model data	struct[]	(MODT) varying count of repeated 12 byte struct
*		MO2S	alternate texture sets	struct	uint32 number of alternate textures. Followed by sets of: uint32 - string name length string - Alt texture name formid - Alt texture formID (TXST) uint32 - model index
-		MOD3	model	zstring	Models\ relative .nif
-		MO3T	model data	struct[]	(MODT) varying count of repeated 12 byte struct
*		MO3S	alternate texture sets	struct	Same as MO2S
-		MOD4	model	zstring	Models\ relative .nif
-		MO4T	model data	struct[]	(MODT) varying count of repeated 12 byte struct
*		MO4S	alternate texture sets	struct	Same as MO2S
-		MOD5	model	zstring	Models\ relative .nif
-		MO5T	model data	struct[]	(MODT) varying count of repeated 12 byte struct
*		MO5S	alternate texture sets	struct	Same as MO2S
-		NAM0	base male texture	formid	(TXST) formid - male
-		NAM1	base female texture	formid	(TXST) formid - female
-		NAM2	base male 1st texture	formid	(TXST) formid - male 1st person
-		NAM3	base female 1st texture	formid	(TXST) formid - female 1st person
*		MODL	included race	formid	(RACE) formid - repeated for each race this is applicable to.
-		SNDD	footstep sound	formid	(FSTS) formid - mostly creatures
-		ONAM	Art Object	formid	(ARTO) formid - mostly creatures