A practical example:
armors:
- type: STR_ALLOY_VEST_UC
spriteInv: MAN_4
extraSprites:
- type: MAN_4
width: 320
height: 200
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4.PNG
This assumes that you only have 1 inventory image available, like Power Suit. However, if you have the 8 different versions (4 male, 4 female) like the vanilla starting armor, then you'll need to define extraSprites differently:
- type: MAN_4F0.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4F0.GIF
- type: MAN_4F1.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4F1.GIF
- type: MAN_4F2.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4F2.GIF
- type: MAN_4F3.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4F3.GIF
- type: MAN_4M0.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4M0.GIF
- type: MAN_4M1.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4M1.GIF
- type: MAN_4M2.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4M2.GIF
- type: MAN_4M3.SPK
singleImage: true
files:
0: Resources/Units/Inventory/INV_MAN_4M3.GIF
And by default the game will use INV_MAN_4M0.GIF for the UFOPedia entry, IIRC